P&L Tables

[NelsonDiazDean]

Hi.

I have been watching the P&L table tutorial, and I don't know hoy to create the measure between two rows. I mean:

Gross Sales Revenues = 33.329

Less return & allowances = 346

Net Sales Revenues = 32.983   (33.329-346).

Direct Materials = -6.320

I don't know if that has to be calculated before the data is loaded, like in n excel, or how it works?