MAPPING THE STRUCTURE OF THE DRE

I WOULD LIKE TO SUGGEST CREATING ANOTHER BOX TO MARK, AN OPTION TO USE THE TOTALS OF THE DRE STRUCTURE, FROM THE TOTALS CREATED ABOVE. EXAMPLE IN THE ATTACHED IMAGE.
IN THIS STRUCTURE TO CALCULATE GROSS PROFIT, THERE SHOULD BE AN OPTION TO SELECT NET REVENUE - VARIABLE COSTS - FIXED PERSONNEL COSTS FROM THE DRE STRUCTURE.