SSM Calculate Measure

Hi experts!!

I want to ask you advice on how could I achieve this:

I have a KPI that has 5 measures (Number of days, Actual Volume, Actual Volume Cumulative, Target Volume and Target Volume Cumulative), and I need to show in Scorecard depending on the Period selected:

If I select last month, I need to show Actual Volume and Target Volume, but if I choose any different option like last quarter, or last year, I need to show Actual Volume Cumulative and Target Volume Cumulative.

That is because the normal Cumulative (last quarter or last year) makes a sum. And the Cumulative calcule that I need to show is different.

I already have these measures calculated in BW, and I got the values in PAS.

Any Idea??

Thanks a lot!

Ingrid J.