Pricing is subject to change without notice. Authorization for price changes will be obtained prio to making any charges to Credit Cards or shipping order. Returns must be accompanied by an RMA (Return Material Authorization) number to qualify for credits or refunds. Freight charges will be added to total. Manuals & Shipping are Non Returnable. Accepting Visa, Mastercard,  and COD. Governmental agencys are extended a Net 30 Payment option. Net 30 terms can be approved. Fax Credit information to 254-595-0620