Paginated Report Totals

Hello,

I am creating a Paginated Report from a PowerBI Dataset. I have a few row groups that are structured hierarchically, and I added a cost column and a a budget column. The totals for these sum up fine, but I also wanted to include a measure from my dataset that divides the cost from the budget. On the total row, instead of calculating the measure from the total cost and budget, it just sums everything from that column. 

How can I set the totals for each group so that the calculated column gives me the calculated amount from the cost and budget totals instead of just summing up the amounts in the column?

Thanks!