Row is not adding in SUM

It did work but I have some % values, so when I SUMX all values then it will sum my percentage values in total as well.

here is my complete Dax where I implemented your solution.

[Combine-Stack-Total Actual MTD -- Testing Aazam ] = 
SUMX (
VALUES ( 'GL Department Accounts-Stack'[GL_Dept_Group_Sort_ID] ),
VAR selectvalue = 'GL Department Accounts-Stack'[GL_Dept_Group_Sort_ID]
VAR totalactualMTD = [Total Actual MTD]
VAR myhomeofficeincome = CALCULATE ([Total Actual MTD],'GL Department Accounts-Stack'[GL_Acct_Group_Sort_ID] = 41,ALL ( 'GL Department Accounts-Stack' ))
VAR MYEXPENSES = CALCULATE ( [Total Actual MTD], 'GL Department Accounts-Stack'[GL_Acct_Group_Sort_ID] = 42, ALL ( 'GL Department Accounts-Stack' ))

VAR MYHomeOffice = myhomeofficeincome - MYEXPENSES

VAR totalrevenue= CALCULATE([Total Actual MTD],'GL Department Accounts-Stack'[GL_Acct_Group_Sort_ID] = 1,
    ALL('GL Department Accounts-Stack'))

VAR totalcogs = CALCULATE([Total Actual MTD],'GL Department Accounts-Stack'[GL_Acct_Group_Sort_ID] = 4,
    ALL('GL Department Accounts-Stack'))

VAR totalpayrollexpense = CALCULATE([Total Actual MTD],'GL Department Accounts-Stack'[GL_Acct_Group_Sort_ID] = 10,
    ALL('GL Department Accounts-Stack'))

VAR totaloperatingexpenses= CALCULATE([Total Actual MTD],'GL Department Accounts-Stack'[GL_Acct_Group_Sort_ID] = 15,
    ALL('GL Department Accounts-Stack'))

VAR totalexternalexpense= CALCULATE([Total Actual MTD],'GL Department Accounts-Stack'[GL_Acct_Group_Sort_ID] = 21,
    ALL('GL Department Accounts-Stack'))

VAR totalrentexpense= CALCULATE([Total Actual MTD],'GL Department Accounts-Stack'[GL_Acct_Group_Sort_ID] = 27,
    ALL('GL Department Accounts-Stack'))    

VAR totalotherexpesnsesincome= CALCULATE([Total Actual MTD],'GL Department Accounts-Stack'[GL_Acct_Group_Sort_ID] =32, ALL('GL Department Accounts-Stack'))

VAR mercsalesGolfOperation= CALCULATE([Total Actual MTD],'GL Department Accounts-Stack'[GL_Acct_Group_Sort_ID] = 40
    && 'GL Department Accounts-Stack'[GL_Dept_Group_Sort_ID]=104,ALL('GL Department Accounts-Stack'))

VAR mercsalesFBCatering= CALCULATE([Total Actual MTD],'GL Department Accounts-Stack'[GL_Acct_Group_Sort_ID] = 40
    && 'GL Department Accounts-Stack'[GL_Dept_Group_Sort_ID]=105,ALL('GL Department Accounts-Stack'))

VAR cogsGolfOperation = CALCULATE([Total Actual MTD],'GL Department Accounts-Stack'[GL_Acct_Group_Sort_ID] = 4
    && 'GL Department Accounts-Stack'[GL_Dept_Group_Sort_ID]=10,ALL('GL Department Accounts-Stack'))

VAR cogsFBcateringBanquet = CALCULATE([Total Actual MTD],'GL Department Accounts-Stack'[GL_Acct_Group_Sort_ID] = 4
    && 'GL Department Accounts-Stack'[GL_Dept_Group_Sort_ID]=12,ALL('GL Department Accounts-Stack'))
VAR totalexternalexpensefinal=(totalexternalexpense+CgpHomeOffice)

VAR grossprofit=(totalrevenue-totalcogs) 
VAR grossprofitpercentage =    DIVIDE(grossprofit,totalrevenue,0  )

VAR revpercentage1=  DIVIDE(totalpayrollexpense,totalrevenue,0) 

VAR clublevelEbitdar= (grossprofit-totalpayrollexpense-totaloperatingexpenses) 

VAR revpercentage2=  DIVIDE(clublevelEbitdar,totalrevenue,0) 

VAR corporateEbitdar= (clublevelEbitdar-totalexternalexpensefinal) 

VAR revpercentage3=    DIVIDE(corporateEbitdar,totalrevenue,0)  

VAR corporateEbitda= (corporateEbitdar-totalrentexpense) 

VAR netincome = (corporateEbitda-totalotherexpesnsesincome) 

VAR cogsgolfoperper=  DIVIDE(cogsGolfOperation,mercsalesGolfOperation,0) 
VAR cogsfbbanquertper=  DIVIDE(cogsFBcateringBanquet,mercsalesFBCatering,0) 

VAR xxx =
SWITCH ( selectvalue, 48, MYHomeOffice, 
17,grossprofit,

  18,grossprofitpercentage,

    29,revpercentage1,

    43,clublevelEbitdar,

    44,revpercentage2,

    51,corporateEbitdar,

    52,revpercentage3,

    57,corporateEbitda,

    74,netincome,

    11,cogsgolfoperper,

    13,cogsfbbanquertper,
totalactualMTD )


//Horizontal Report Structure

VAR CalcType = SELECTEDVALUE('GL Department Accounts-Stack'[Calc Type])  
// should it be a simple total or a running total?

VAR DisplayDetailCode = SELECTEDVALUE('GL Department Accounts-Stack'[Show Detail])  
// 1 if the detail should display and 0 if detail should be hidden

VAR isSubHeaderVisible = ISFILTERED('GL Department Accounts-Stack'[Stack_Dept_Name])  
//we need to know if the sub header is trying to show itself

VAR ismainHeaderVisible = ISFILTERED('GL Department Accounts-Stack'[Stack Accounts Group])  
//we need to know if the sub header is trying to show itself

VAR AccountGroupID = SELECTEDVALUE('GL Department Accounts-Stack'[GL_Acct_Group_Sort_ID])
// Get the selected Account Group ID
var reeturn =  SWITCH(TRUE(),
              
              isSubHeaderVisible=TRUE() && DisplayDetailCode = "0" && CalcType = "20" && 
            AccountGroupID <> 37 && AccountGroupID <>39 && 
            AccountGroupID <>7  && AccountGroupID <>8 && AccountGroupID <>13 && AccountGroupID <>18 &&    AccountGroupID <>19 && AccountGroupID <>24 && AccountGroupID <>25 && AccountGroupID <>30
&& AccountGroupID <>35                           
            ,BLANK(),

               isSubHeaderVisible=TRUE() && AccountGroupID =  37 ,REPT("A", 10),
               isSubHeaderVisible=TRUE() && AccountGroupID =  39 ,REPT("A", 10),



               //[Stack-Total Actual MTD]
                xxx
               )
return reeturn)