Subtracting two measures

[Anonymous]

Hello everyone.

I have a simple question that keeps haunting me. I have 2 columns with Liablities and Receivables and I created formulas to sum it and then subtract.

Liablities Measure = SUMX(Table, Table[Liablities])

Receivables Measure = SUMX(Table, Table[Receivables])

What I want to do is subtract two columns for every month in a matrix.

I know the proper measure will be:

Result = Receivables Measure - Liablities Measure

But the question is: why formula:

SUMX(Table, Receivables Measure - Liablities Measure) outputs different results for certain motnhs than formula above?How does it work exactly?

Also the formula

CALCULATE(Receivables Measure - Liablities Measure)

outputs proper results too. How does it work exactly? How can I know if I'm using the proper formula in advanced calculations and results are proper?

[Greg_Deckler]

@Anonymous - Tough to say with information provided, but in general, simpler is better. I would stick with 

Result = Receivables Measure - Liablities Measure

Unless there is some reason not to, like a measures total problem. 
https://community.powerbi.com/t5/Quick-Measures-Gallery/Measure-Totals-The-Final-Word/m-p/547907

I don't think your SUMX is a good idea there and your CALCULATE is useless because you are not switching context. So, it does 100% nothing.