<?xml version="1.0" encoding="utf-8"?>
<!--XBRL International Inc Financial Accounts Taxonomy-->
<linkbase
  xmlns="http://www.xbrl.org/2003/linkbase"
  xmlns:xbrli="http://www.xbrl.org/2003/instance"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
    <roleRef
      roleURI="http://www.xbrl.org/taxonomy/xii/2023-06-30/role/BS"
      xlink:href="xii-20230630.xsd#roleType_BS"
      xlink:type="simple"/>
    <roleRef
      roleURI="http://www.xbrl.org/taxonomy/xii/2023-06-30/role/CF"
      xlink:href="xii-20230630.xsd#roleType_CF"
      xlink:type="simple"/>
    <roleRef
      roleURI="http://www.xbrl.org/taxonomy/xii/2023-06-30/role/NS"
      xlink:href="xii-20230630.xsd#roleType_NS"
      xlink:type="simple"/>
    <roleRef
      roleURI="http://www.xbrl.org/taxonomy/xii/2023-06-30/role/IS"
      xlink:href="xii-20230630.xsd#roleType_IS"
      xlink:type="simple"/>
    <calculationLink
      xlink:role="http://www.xbrl.org/taxonomy/xii/2023-06-30/role/BS"
      xlink:type="extended">
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Assets"
          xlink:label="us-gaap_Assets"
          xlink:type="locator"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsCurrent"
          xlink:label="us-gaap_AssetsCurrent"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_Assets"
          xlink:to="us-gaap_AssetsCurrent"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"
          xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_AssetsCurrent"
          xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccountsReceivableNetCurrent"
          xlink:label="us-gaap_AccountsReceivableNetCurrent"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_AssetsCurrent"
          xlink:to="us-gaap_AccountsReceivableNetCurrent"
          xlink:type="arc"/>
        <loc
          xlink:href="xii-20230630.xsd#xii_ConferenceFeesReceivableCurrent"
          xlink:label="xii_ConferenceFeesReceivableCurrent"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_AssetsCurrent"
          xlink:to="xii_ConferenceFeesReceivableCurrent"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherReceivablesNetCurrent"
          xlink:label="us-gaap_OtherReceivablesNetCurrent"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_AssetsCurrent"
          xlink:to="us-gaap_OtherReceivablesNetCurrent"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"
          xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_AssetsCurrent"
          xlink:to="us-gaap_PrepaidExpenseAndOtherAssetsCurrent"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsNoncurrent"
          xlink:label="us-gaap_AssetsNoncurrent"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_Assets"
          xlink:to="us-gaap_AssetsNoncurrent"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesAndStockholdersEquity"
          xlink:label="us-gaap_LiabilitiesAndStockholdersEquity"
          xlink:type="locator"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesCurrent"
          xlink:label="us-gaap_LiabilitiesCurrent"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_LiabilitiesAndStockholdersEquity"
          xlink:to="us-gaap_LiabilitiesCurrent"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent"
          xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_LiabilitiesCurrent"
          xlink:to="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"
          xlink:label="us-gaap_ContractWithCustomerLiabilityCurrent"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_LiabilitiesCurrent"
          xlink:to="us-gaap_ContractWithCustomerLiabilityCurrent"
          xlink:type="arc"/>
        <loc
          xlink:href="xii-20230630.xsd#xii_UnearnedDues"
          xlink:label="xii_UnearnedDues"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_ContractWithCustomerLiabilityCurrent"
          xlink:to="xii_UnearnedDues"
          xlink:type="arc"/>
        <loc
          xlink:href="xii-20230630.xsd#xii_UnearnedContractRevenues"
          xlink:label="xii_UnearnedContractRevenues"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_ContractWithCustomerLiabilityCurrent"
          xlink:to="xii_UnearnedContractRevenues"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredIncomeCurrent"
          xlink:label="us-gaap_DeferredIncomeCurrent"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_LiabilitiesCurrent"
          xlink:to="us-gaap_DeferredIncomeCurrent"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquity"
          xlink:label="us-gaap_StockholdersEquity"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_LiabilitiesAndStockholdersEquity"
          xlink:to="us-gaap_StockholdersEquity"
          xlink:type="arc"/>
    </calculationLink>
    <calculationLink
      xlink:role="http://www.xbrl.org/taxonomy/xii/2023-06-30/role/IS"
      xlink:type="extended">
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLoss"
          xlink:label="us-gaap_NetIncomeLoss"
          xlink:type="locator"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Revenues"
          xlink:label="us-gaap_Revenues"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_NetIncomeLoss"
          xlink:to="us-gaap_Revenues"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax"
          xlink:label="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_Revenues"
          xlink:to="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InvestmentIncomeInterest"
          xlink:label="us-gaap_InvestmentIncomeInterest"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_Revenues"
          xlink:to="us-gaap_InvestmentIncomeInterest"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CostsAndExpenses"
          xlink:label="us-gaap_CostsAndExpenses"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="-1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_NetIncomeLoss"
          xlink:to="us-gaap_CostsAndExpenses"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SalariesWagesAndOfficersCompensation"
          xlink:label="us-gaap_SalariesWagesAndOfficersCompensation"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_CostsAndExpenses"
          xlink:to="us-gaap_SalariesWagesAndOfficersCompensation"
          xlink:type="arc"/>
        <loc
          xlink:href="xii-20230630.xsd#xii_MeetingExpense"
          xlink:label="xii_MeetingExpense"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_CostsAndExpenses"
          xlink:to="xii_MeetingExpense"
          xlink:type="arc"/>
        <loc
          xlink:href="xii-20230630.xsd#xii_MaintenanceExpense"
          xlink:label="xii_MaintenanceExpense"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_CostsAndExpenses"
          xlink:to="xii_MaintenanceExpense"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TravelAndEntertainmentExpense"
          xlink:label="us-gaap_TravelAndEntertainmentExpense"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_CostsAndExpenses"
          xlink:to="us-gaap_TravelAndEntertainmentExpense"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MarketingExpense"
          xlink:label="us-gaap_MarketingExpense"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_CostsAndExpenses"
          xlink:to="us-gaap_MarketingExpense"
          xlink:type="arc"/>
        <loc
          xlink:href="xii-20230630.xsd#xii_LicenseFees"
          xlink:label="xii_LicenseFees"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_CostsAndExpenses"
          xlink:to="xii_LicenseFees"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RoyaltyExpense"
          xlink:label="us-gaap_RoyaltyExpense"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_CostsAndExpenses"
          xlink:to="us-gaap_RoyaltyExpense"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProfessionalFees"
          xlink:label="us-gaap_ProfessionalFees"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_CostsAndExpenses"
          xlink:to="us-gaap_ProfessionalFees"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GeneralInsuranceExpense"
          xlink:label="us-gaap_GeneralInsuranceExpense"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_CostsAndExpenses"
          xlink:to="us-gaap_GeneralInsuranceExpense"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherSellingGeneralAndAdministrativeExpense"
          xlink:label="us-gaap_OtherSellingGeneralAndAdministrativeExpense"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_CostsAndExpenses"
          xlink:to="us-gaap_OtherSellingGeneralAndAdministrativeExpense"
          xlink:type="arc"/>
        <loc
          xlink:href="xii-20230630.xsd#xii_BankCharges"
          xlink:label="xii_BankCharges"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_CostsAndExpenses"
          xlink:to="xii_BankCharges"
          xlink:type="arc"/>
        <loc
          xlink:href="xii-20230630.xsd#xii_ConferenceExpenses"
          xlink:label="xii_ConferenceExpenses"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_CostsAndExpenses"
          xlink:to="xii_ConferenceExpenses"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProvisionForDoubtfulAccounts"
          xlink:label="us-gaap_ProvisionForDoubtfulAccounts"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_CostsAndExpenses"
          xlink:to="us-gaap_ProvisionForDoubtfulAccounts"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax"
          xlink:label="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="-1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_CostsAndExpenses"
          xlink:to="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax"
          xlink:type="arc"/>
        <loc
          xlink:href="xii-20230630.xsd#xii_ReleasedFromRestrictionsAmount"
          xlink:label="xii_ReleasedFromRestrictionsAmount"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_NetIncomeLoss"
          xlink:to="xii_ReleasedFromRestrictionsAmount"
          xlink:type="arc"/>
    </calculationLink>
    <calculationLink
      xlink:role="http://www.xbrl.org/taxonomy/xii/2023-06-30/role/CF"
      xlink:type="extended">
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"
          xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"
          xlink:type="locator"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"
          xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"
          xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProfitLoss"
          xlink:label="us-gaap_ProfitLoss"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities"
          xlink:to="us-gaap_ProfitLoss"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProvisionForDoubtfulAccounts"
          xlink:label="us-gaap_ProvisionForDoubtfulAccounts"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities"
          xlink:to="us-gaap_ProvisionForDoubtfulAccounts"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"
          xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="-1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities"
          xlink:to="us-gaap_IncreaseDecreaseInAccountsReceivable"
          xlink:type="arc"/>
        <loc
          xlink:href="xii-20230630.xsd#xii_IncreaseDecreaseConferenceFeesReceivable"
          xlink:label="xii_IncreaseDecreaseConferenceFeesReceivable"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="-1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities"
          xlink:to="xii_IncreaseDecreaseConferenceFeesReceivable"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInOtherReceivables"
          xlink:label="us-gaap_IncreaseDecreaseInOtherReceivables"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="-1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities"
          xlink:to="us-gaap_IncreaseDecreaseInOtherReceivables"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"
          xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="-1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities"
          xlink:to="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInAccountsPayableTrade"
          xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableTrade"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities"
          xlink:to="us-gaap_IncreaseDecreaseInAccountsPayableTrade"
          xlink:type="arc"/>
        <loc
          xlink:href="xii-20230630.xsd#xii_IncreaseDecreaseInUnearnedDues"
          xlink:label="xii_IncreaseDecreaseInUnearnedDues"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities"
          xlink:to="xii_IncreaseDecreaseInUnearnedDues"
          xlink:type="arc"/>
        <loc
          xlink:href="xii-20230630.xsd#xii_IncreaseDecreaseInUnearnedContractRevenues"
          xlink:label="xii_IncreaseDecreaseInUnearnedContractRevenues"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities"
          xlink:to="xii_IncreaseDecreaseInUnearnedContractRevenues"
          xlink:type="arc"/>
        <loc
          xlink:href="xii-20230630.xsd#xii_IncreaseDecreaseInDeferredIncome"
          xlink:label="xii_IncreaseDecreaseInDeferredIncome"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities"
          xlink:to="xii_IncreaseDecreaseInDeferredIncome"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"
          xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"
          xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivities"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"
          xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"
          xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities"
          xlink:type="arc"/>
    </calculationLink>
    <calculationLink
      xlink:role="http://www.xbrl.org/taxonomy/xii/2023-06-30/role/NS"
      xlink:type="extended">
        <loc
          xlink:href="xii-20230630.xsd#xii_FinancialAssetsToMeetGeneralExpenditures"
          xlink:label="xii_FinancialAssetsToMeetGeneralExpenditures"
          xlink:type="locator"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"
          xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="xii_FinancialAssetsToMeetGeneralExpenditures"
          xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ReceivablesNetCurrent"
          xlink:label="us-gaap_ReceivablesNetCurrent"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="xii_FinancialAssetsToMeetGeneralExpenditures"
          xlink:to="us-gaap_ReceivablesNetCurrent"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax"
          xlink:label="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax"
          xlink:type="locator"/>
        <loc
          xlink:href="xii-20230630.xsd#xii_GrossRevenue"
          xlink:label="xii_GrossRevenue"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax"
          xlink:to="xii_GrossRevenue"
          xlink:type="arc"/>
        <loc
          xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingCostsAndExpenses"
          xlink:label="us-gaap_OperatingCostsAndExpenses"
          xlink:type="locator"/>
        <calculationArc
          order="1"
          weight="-1"
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item"
          xlink:from="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax"
          xlink:to="us-gaap_OperatingCostsAndExpenses"
          xlink:type="arc"/>
    </calculationLink>
</linkbase>
