When quantity changes occur, you can perform automatic correction of an item amount using the user parameter RBB. You can use automatic amount correction in the applications Enter Invoice and Park Invoice, for example, if you often create partial invoices. The user parameter contains 13 characters. The thirteenth character is relevant for setting automatic amount correction.

If you enter an X for the thirteenth character, automatic amount correction takes place. This means that if you change the quantity of an invoice item and then choose Enter, the system automatically calculates the new item amount. If you have already entered the quantity and item amount manually, and you change the quantity afterwards, the system does not calculate the amount again.

If you enter a blank for the thirteenth character of the user parameter, you have to enter the values for quantities and amounts manually.