The unit price (list price or sale price) comes from a sales contract (or the scope of sale based on the item) and our line discount comes from the sales line discount commercial agreement. All sale and purchase and discount agreements are recorded in the same table and use the familiar „Table/Group/All“ hierarchy. Customer A receives a 20% discount on all items on the default sales price list The sales contract must be set to status = valid before being used by the system. Sales contracts take precedence over commercial agreements. They are an obligation for a given organization to purchase a certain amount. While it is possible to apply a trade agreement to a single customer, trade agreements are not an obligation. They want, for example, to implement a sales contract after a price negotiation.