Column Calculation

Hi,

In a FSG report which includes 4 columns (Company1, Company2, Company3 & Group), the goup column has to include figures as belaw

Sales (Raw1) Addition of Company 2 & 3

Cost of sales (Raw 2) Only company 1

Gross Profit (Raw 3) Addition of Company 2 & 3 - Company 1

Expenses (Raw 4) Addition of all 3 columns

(Natural accounts have been assigned to raw set & company values have been assigned to column set)

Is it possible to set up the group column as the above requirement?

Thank you