Cumulative sum over ROW in Dynamic Cross Table (QlikSense)

I have a measure "Sales" by "month":

and I need the cumulative sum presented in a Dynamic cross table :

I tried using

RangeSum(Above(TOTAL Sum(Sales), 0, RowNO(TOTAL)))

It works for normal tables (by column) but when I use it in a dynamic cross table (by row), I get:

I've also seen solutions involving changing the script but it would almost double the size of my app.

Since you are transposing the month dimension then the values are becoming columns.

The expression should be changed to respect that:

• Above is now Before
• RowNo is now ColumnNo

The full expression will be:

Rangesum(Before(Sum(Sales),0,ColumnNo()))

And the result table is: