Periodic Revenue (Reverse YTD)

Imagine you have a table that only includes YTD Revenue such as this:

RevenueYTD

Year        Month    Revenue YTD

You wish to reverse engineer the montly revenue figures. You can use a measure such as this:

Periodic Revenue = 
VAR MyMonth = MAX(RevenueYTD[Month])
VAR MyYear = MAX(RevenueYTD[Year])
RETURN 
    SUM(RevenueYTD[Revenue YTD]) 
    - CALCULATE(
            SUM(RevenueYTD[Revenue YTD])
            ,FILTER(
                ALL(RevenueYTD)
                ,RevenueYTD[Month]=MyMonth-1 && RevenueYTD[Year]=MyYear
            )
      )

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