Create an article with a '-' amount.

It is possible to create a product with a '-' amount.

Here is an example of a product with a '-' € 5.00

Create a product with a gross selling price of € 5.00

Under the 'Sales' tab, it can be indicated that the 'Default sales quantity' is -1.

If this product is now processed at the cash register, the price will be - € 5.00