Show Profit In Ledger Voucher

Dear All Intellectual Members.
I have create TDL to show profit in Ledger Voucher Report. I want that make a Key/Button Same Same Like Show/Hide Profit Button and this Button Filter Sales Voucher From the Report.
I also want code to show total of profit in report.

 

HELLO SIR,
HOW DOES IT CALCULATE I CAN'T UNDERSTAND PROFIT

 

it takes grossprofit value of that transaction..
Set as : if $$IsVoucher:sales AND $IsCancelled then "" else $GrossProfit
and this doesn't filter sales voucher...it shows in payment voucher too..