Section 230.5 - Terms and shipping(a) Prices are given in the SP 260 supplement. These prices are subject to revision and orders will be billed for prices in effect at the time of shipment. No discounts are given on purchases of SRM's.(b) Payment need not accompany a purchase order. Payment is due within 30 days of receipt of an invoice.(c) SRM's are shipped in the most expeditious manner that complies with transportation and postal laws and regulations.