The PayPal shopping cart program is a CGI program written in Perl 5 and Javascript. This program was designed to work directly with PayPal. We designed it with a "retail price system" and a "wholesale price system." The admin can use one system and ignore the other as they are separate. All of the credit card or on line check processing is done on the PayPal side. After purchase site admin is sent all the customers pertinent info for item shipping etc.