Measure help. Removing an amount from the totals

[User7664]

Hi All

I have an matrix table that looks like the below.

The amount in Account 1 Sub Account B needs to subtracted away from Sub account A. The ledger system listed sub account b for reference only but it is already included in sub account a (i have no control over the data output). 

Sub Account A should equal 400,000 in Jan and 520,000 in Feb. The totals for account 1 in Jan should therefore be 400k and 520k for Feb. 

I cannot for the life of me work out how to do this with a measure. 

I've saved a sample PBIX file to gdrive. Any pointers would be great. 

[Jihwan_Kim · Accepted solution]

Hi, @User7664 

Please check the below picture and the sample pbix file's link down below.

The measure is in the sample pbix file.

Account1 fix =
VAR subaccounta =
CALCULATE (
SUM ( 'Sample'[ Amount ] ),
'Sample'[Sub Account] = "Sub Account A"
)
VAR subaccountb =
CALCULATE (
SUM ( 'Sample'[ Amount ] ),
'Sample'[Sub Account] = "Sub Account B"
)
VAR account2 =
CALCULATE ( SUM ( 'Sample'[ Amount ] ), 'Sample'[Account] = "Account 2" )
RETURN
SWITCH (
TRUE (),
SELECTEDVALUE ( 'Sample'[Sub Account] ) = "Sub Account A", subaccounta - subaccountb,
SELECTEDVALUE ( 'Sample'[Sub Account] ) = "Sub Account B", BLANK (),
SELECTEDVALUE ( 'Sample'[Account] ) = "Account 1", subaccounta - subaccountb,
NOT ISFILTERED ( 'Sample'[Account] ),
account2 + subaccounta - subaccountb,
SUM ( 'Sample'[ Amount ] )
)

https://www.dropbox.com/s/nynsd9omaxzmu0r/Sample%202.pbix?dl=0 

Hi, My name is Jihwan Kim.

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[User7664]

Should this be done in the query editor? I think a measure is the best way?