How do I issue debit note invoice to a supplier after returning a product?

And calculates the trade discount based on a percentage of the price list (catalog), and so is the net price is the price agreed upon and that the basis for the under-the-books take, ie, that the trade discount Istnzel of the invoice and the net is a mutual price between the buyer and the seller, whether they are practical for cash or credit.

Agreed Istnzel opponent of the bill restricts net books.

If the facility has sold80 dress the dress price of AED100 commercial10% discount determines the selling price as follows:

8000.80 value gown at100 for one

10% discount shopping discount

7200 net amount required

Being constraint on the basis of7200 and not8000.