Adding Margin to Final Cost

Hello , we know that adding margin for one item can be done in quotation by using discount and margin fields. After adding margin/discount the value is altered to that one item. Suppose if we want to add margin at final cost/Grand Total/Rounded Total in quotation how we can do, without adding margin to item. After selecting the item cost, tax & charges we have to add margin to Final cost how we can do ?

The feature is not available out of the box in ERPNext.

ok ty sir for helping about query :slight_smile: