Use this window to register price adjustments. A price adjustment
can be used to add or deduct an amount of money to the internal price or sales price when
making a transaction. The amount can be in the form of a fixed amount, or a percentage of
the price. If you combine the two options, the price adjustment is calculated according to
the following formula:
(Original Price * Percentage) + Fixed Amount = Price Adjustment
A price adjustment can be useful when an agreement of e.g. a discount has been made with a customer, and you do not want to modify your price lists for that reason.