<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2020 Workiva-->
<!--r:67c1b766-deed-4a16-ba9f-f2a7a720339c,g:cbe4920a-8349-4931-9cc4-2115f6ef322b-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" 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">
  <link:roleRef roleURI="http://www.vectorgroupltdcik0000766404.com/role/Cover" xlink:type="simple" xlink:href="msof-20200430.xsd#Cover"/>
  <link:calculationLink xlink:role="http://www.vectorgroupltdcik0000766404.com/role/Cover" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.vectorgroupltdcik0000766404.com/role/CondensedBalanceSheets" xlink:type="simple" xlink:href="msof-20200430.xsd#CondensedBalanceSheets"/>
  <link:calculationLink xlink:role="http://www.vectorgroupltdcik0000766404.com/role/CondensedBalanceSheets" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_ef2225a4-4cc3-43a8-b4e9-f1a526c42b4d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_decc2c22-0920-44a6-9545-e4441d991b87" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_ef2225a4-4cc3-43a8-b4e9-f1a526c42b4d" xlink:to="loc_us-gaap_LiabilitiesCurrent_decc2c22-0920-44a6-9545-e4441d991b87" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DueToOfficersOrStockholdersNoncurrent_d342f8ef-7060-466c-a80d-3f450c3c4c5e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DueToOfficersOrStockholdersNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_ef2225a4-4cc3-43a8-b4e9-f1a526c42b4d" xlink:to="loc_us-gaap_DueToOfficersOrStockholdersNoncurrent_d342f8ef-7060-466c-a80d-3f450c3c4c5e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_2cef2927-679d-4467-af0c-ef27a786c40d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_27ee0891-6b9e-46b4-9a34-fe970fc782d4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Liabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_2cef2927-679d-4467-af0c-ef27a786c40d" xlink:to="loc_us-gaap_Liabilities_27ee0891-6b9e-46b4-9a34-fe970fc782d4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_daef173e-b06f-4c71-9c75-01e800c6e612" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_2cef2927-679d-4467-af0c-ef27a786c40d" xlink:to="loc_us-gaap_StockholdersEquity_daef173e-b06f-4c71-9c75-01e800c6e612" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_3617d7df-e620-43b9-bb30-01305f05f451" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_8e2436cc-899c-484b-8142-d765e958d663" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_3617d7df-e620-43b9-bb30-01305f05f451" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_8e2436cc-899c-484b-8142-d765e958d663" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_8dfcbbbe-71ba-4ac3-a09a-b40852b3cedb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_d28630fa-86e8-4f26-9a4b-c7bac543823e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_8dfcbbbe-71ba-4ac3-a09a-b40852b3cedb" xlink:to="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_d28630fa-86e8-4f26-9a4b-c7bac543823e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_08cf2be3-dc0c-4b04-8345-5e69b10a6cf5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_e32d88e8-cbfe-4d8d-a0a0-11c269710754" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_08cf2be3-dc0c-4b04-8345-5e69b10a6cf5" xlink:to="loc_us-gaap_PreferredStockValue_e32d88e8-cbfe-4d8d-a0a0-11c269710754" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_e4d5ca11-e3ee-4627-8df3-41c725b9641e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_08cf2be3-dc0c-4b04-8345-5e69b10a6cf5" xlink:to="loc_us-gaap_CommonStockValue_e4d5ca11-e3ee-4627-8df3-41c725b9641e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_d85c0ca6-e77c-46f5-8414-a8017e2448be" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_08cf2be3-dc0c-4b04-8345-5e69b10a6cf5" xlink:to="loc_us-gaap_AdditionalPaidInCapital_d85c0ca6-e77c-46f5-8414-a8017e2448be" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_9b5323b4-e4d9-4a89-8c98-f958f8ae2de5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_08cf2be3-dc0c-4b04-8345-5e69b10a6cf5" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_9b5323b4-e4d9-4a89-8c98-f958f8ae2de5" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.vectorgroupltdcik0000766404.com/role/CondensedBalanceSheetsParenthetical" xlink:type="simple" xlink:href="msof-20200430.xsd#CondensedBalanceSheetsParenthetical"/>
  <link:calculationLink xlink:role="http://www.vectorgroupltdcik0000766404.com/role/CondensedBalanceSheetsParenthetical" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.vectorgroupltdcik0000766404.com/role/CondensedStatementsofOperations" xlink:type="simple" xlink:href="msof-20200430.xsd#CondensedStatementsofOperations"/>
  <link:calculationLink xlink:role="http://www.vectorgroupltdcik0000766404.com/role/CondensedStatementsofOperations" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDebtExpense_f28da698-6548-4ae1-b2eb-6a293cf016f4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestAndDebtExpense"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_02e074a8-dc5f-4660-b32f-92d2bb473ed8" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestAndDebtExpense_f28da698-6548-4ae1-b2eb-6a293cf016f4" xlink:to="loc_us-gaap_InterestExpense_02e074a8-dc5f-4660-b32f-92d2bb473ed8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_a1ddb2c5-b9a8-4a5d-abc8-4fb57926333a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_161576c3-6389-4a32-b3ae-6b4f7825b4c9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_a1ddb2c5-b9a8-4a5d-abc8-4fb57926333a" xlink:to="loc_us-gaap_OperatingIncomeLoss_161576c3-6389-4a32-b3ae-6b4f7825b4c9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDebtExpense_cc4bd54c-7a46-4851-bd1a-e8245dca87cc" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestAndDebtExpense"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_a1ddb2c5-b9a8-4a5d-abc8-4fb57926333a" xlink:to="loc_us-gaap_InterestAndDebtExpense_cc4bd54c-7a46-4851-bd1a-e8245dca87cc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_1b810a42-edce-4180-a1f0-34e48e73fbd9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_393a623b-7bc9-4219-957f-2f29444a43a4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingExpenses"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_1b810a42-edce-4180-a1f0-34e48e73fbd9" xlink:to="loc_us-gaap_OperatingExpenses_393a623b-7bc9-4219-957f-2f29444a43a4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_da30f03b-4300-4657-9a3f-f717ece88c8e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_8c826247-a836-4c61-b7bd-3c0c000cf390" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_da30f03b-4300-4657-9a3f-f717ece88c8e" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_8c826247-a836-4c61-b7bd-3c0c000cf390" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_76c74154-f795-405d-b211-27417186e82d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_da30f03b-4300-4657-9a3f-f717ece88c8e" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_76c74154-f795-405d-b211-27417186e82d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_329834ad-af65-48ae-b6c5-6b73ef96aabb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingExpenses"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_4af334fa-2896-4e48-8895-71f8a5daa264" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_329834ad-af65-48ae-b6c5-6b73ef96aabb" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_4af334fa-2896-4e48-8895-71f8a5daa264" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.vectorgroupltdcik0000766404.com/role/CondensedStatementofShareholdersDeficiency" xlink:type="simple" xlink:href="msof-20200430.xsd#CondensedStatementofShareholdersDeficiency"/>
  <link:calculationLink xlink:role="http://www.vectorgroupltdcik0000766404.com/role/CondensedStatementofShareholdersDeficiency" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.vectorgroupltdcik0000766404.com/role/CondensedStatementsofCashFlows" xlink:type="simple" xlink:href="msof-20200430.xsd#CondensedStatementsofCashFlows"/>
  <link:calculationLink xlink:role="http://www.vectorgroupltdcik0000766404.com/role/CondensedStatementsofCashFlows" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_d99a4ce3-7b55-4aad-9561-d098a0e7ee28" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_5529ff3c-2c6c-4ef2-a02c-25429f40d004" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_d99a4ce3-7b55-4aad-9561-d098a0e7ee28" xlink:to="loc_us-gaap_NetIncomeLoss_5529ff3c-2c6c-4ef2-a02c-25429f40d004" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_1693eaee-6974-4932-9102-7f75440de48c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_d99a4ce3-7b55-4aad-9561-d098a0e7ee28" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_1693eaee-6974-4932-9102-7f75440de48c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInterestPayableNet_82b10076-2b0c-4537-b145-76d85bf0b422" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInInterestPayableNet"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_d99a4ce3-7b55-4aad-9561-d098a0e7ee28" xlink:to="loc_us-gaap_IncreaseDecreaseInInterestPayableNet_82b10076-2b0c-4537-b145-76d85bf0b422" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_f4bb07e4-908d-4d78-a4f0-fbb321a4ebd5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_d918c461-a75d-42da-8b5e-c76b0b48f297" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_f4bb07e4-908d-4d78-a4f0-fbb321a4ebd5" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_d918c461-a75d-42da-8b5e-c76b0b48f297" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.vectorgroupltdcik0000766404.com/role/SummaryofSignificantAccountingPoliciesandOrganization" xlink:type="simple" xlink:href="msof-20200430.xsd#SummaryofSignificantAccountingPoliciesandOrganization"/>
  <link:calculationLink xlink:role="http://www.vectorgroupltdcik0000766404.com/role/SummaryofSignificantAccountingPoliciesandOrganization" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.vectorgroupltdcik0000766404.com/role/SummaryofSignificantAccountingPoliciesandOrganizationPolicies" xlink:type="simple" xlink:href="msof-20200430.xsd#SummaryofSignificantAccountingPoliciesandOrganizationPolicies"/>
  <link:calculationLink xlink:role="http://www.vectorgroupltdcik0000766404.com/role/SummaryofSignificantAccountingPoliciesandOrganizationPolicies" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.vectorgroupltdcik0000766404.com/role/DueToShareholder" xlink:type="simple" xlink:href="msof-20200430.xsd#DueToShareholder"/>
  <link:calculationLink xlink:role="http://www.vectorgroupltdcik0000766404.com/role/DueToShareholder" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.vectorgroupltdcik0000766404.com/role/DueToShareholderDetails" xlink:type="simple" xlink:href="msof-20200430.xsd#DueToShareholderDetails"/>
  <link:calculationLink xlink:role="http://www.vectorgroupltdcik0000766404.com/role/DueToShareholderDetails" xlink:type="extended"/>
</link:linkbase>
