FSG need assistance

Hello Expert!

I have to create an FSG the columns amount type should be YTD  ( by month) for all lines in the Row set  except for one row set  that the amount should be PTD.

How can i do that?

i go to the disered row set , and i modify the amount type to PTD , but the reuslt is that i have the same amount for the current month in all the culumns of the FSG.

This is an example of the needs

    

	JAN-20 (YTD)		FEB-20 (YTD)	……..DEC-20   (YTD)
ROW1	YTD AMOUNT		YTD AMOUNT	YTD AMOUNT
ROW2	PTD AMOUNT		PTD AMOUNT