Cart & PayPal Integration

The site currently offer a user to selct an event to a shopping cart and then they can check out using PayPal. However, the client would like to allow the user to select all events they want to attend and pay for all events with one PayPal transaction. Designer will need to set up for the user to select multiple events, pay for dues and select clothing and then create an invoice for cart then transfer them to paypal to make one payment and then after payment is complete to return them to the site. Finally, the client would like what the user paid for the appear on their on their profile page. The events, dues, clothing section will need to be built so that the client can populate that area each year with new dates, etc. This is for a not for group so they have a limited budget. This must be completed by August 10. The site is [login to view URL],