This is the discount for early payment. It is calculated from information in the Vendors selection of the Maintain menu and the Invoice Total.
Volume or other discounts should be entered as a credit in the distribution list box.
Note: The discount amount is recalculated every time the distribution list box changes. If the vendor has given you a different discount amount than what Sage 50 will calculate, don't enter the amount until all the distribution list box items have been entered.