Total Sales by User Report - Total Sales minus Total Refunds against their sales

Hi,

Total sales by User / Invoice List of a user
Less/Minus all refunds against the User-generated receipts/invoices.

Let's say User "A" sold 5 times of something, that guy leaves and now User "B" is on the cash counter. The customer comes back and returns 2 or all 5 items purchased from User "A". This refund only appears in User "B's" refund report. That is ok on its own.

I humbly request you to make another report in which the refund affects Receipt/Invoice List Amounts. This will help me see the exact sales amount by each User because all the refunds get deducted from the original seller and their total sales fall accordingly (total sales minus total refunds made against their sales).

Thank you very much!