Rolling YTD measure using fields with category

Hi there. 

I've used this (9) Power BI Show Year-to-Date (YTD) Across Multiple Years - YouTube by Avi Singh to build a measure which calculates the Rolling YTD sum of kg porduced. 

The formula is:

qty_kg_ROLYTD = VAR MaxMonthYTD = [This Month for YTD]
RETURN calculate(sum(SAPProdConfirmation[qty_kg]), DateTable[month]=MaxMonthYTD)

where "This Month for YTD is":

This Month for YTD = calculate(MAX(DateTable[month]), ALL(DateTable),(DateTable[MonthOffset]=0))

My dataset can manage that but I have a category for each row of quantity, which says if the quantity declared is scrap or good. 

For example:

The measure I've built does not fit with the quality status assignment, as you can see:

Actually I'm not surprise, but I need to fix this without creating a measure for each quality status value, I want to manage it in a single measure. 

Do you have any suggestion? Thanks.