We will extend net 30 day open account terms to accounts with pre-approved credit or to public and parochial high schools, colleges, hospitals, and governmental bodies with approved purchase order. Past due accounts will be charged 1½% per month late charge. All other orders must be prepaid by cash, certified check, money order or charge it on MasterCard or Visa. Sorry no C.O.D's. Prices, products and terms are subject to change without notice. All orders must be paid in U.S. funds. Please prepay orders under $25.00 adding $5.00 small order charge and shipping, handling and insurance from chart below.