You have granted a cash discount of 3% for all invoices issued up to the 15th of the month and paid by the 31st of the same month. If payment is made after the 31st of the month but by the 15th of the following month, a 2% cash discount is granted. By the 31st of the following month, the invoices are due net.

All invoices issued between the 16th and the last day of the month, and paid by the 15th of the following month receive 3% cash discount. If the invoices are paid after the 15th but by the 31st of the following month, a cash discount amount of 2% is granted. The invoices are to be paid net up to the 15th of the following month. The baseline date is the document date.

You must define the terms of payment twice: once with a day limit of 15 and once with a day limit of 31.