I need an experienced [login to view URL] developer to connect our existing payment page (attached) to our new account. We want to allow the option of still using PayPal. So they can choose whether to use PayPal or pay with their credit card via authorize.net. After payment the customer should be returned to our site.
All files are attached. I believe most of the payment processing is handled in [login to view URL], [login to view URL], [login to view URL], PaymentGateway.php.