Seller shall invoice Buyer upon and for each shipment. Buyer shall pay for the total sale amount $_________________ in $___ equal payments over the course of the_____ months following acceptance of the goods delivered. The first payment shall be due __ day of _______, 20__ , with equal payments to follow the same day the next month for ___months. Any late payment shall bear a late charge of ___%. If Seller undertakes collection or enforcement efforts, Buyer shall be liable for all costs thereof, including attorney fees.