Accumulation second dimension

[#1]

I have two dimensions (customers, year) and I need to show accumulation sales (attached image)

How to count it?

Thanks

[er_mohit]

rangesum(above(sum(Fieldname),0,rowno()))

[Gysbert_Wassenaar]

Depends on how you want to accumulate. You can try something like rangesum(above(sum(Sales),0,rowno())) to accumulate over customers or rangesum(before(sum(Sales),0,columnno())) to accumulate over years.

[#4]

I want to accumulate over customers for one year