We have a cart up and running at [login to view URL] - it's on a custom PHP MVC framework.
This project is to get a receipt built into the confirmation page.
After you pay there is a confirmation page that says:
Thank You.
There exists an order detail page already because it gets emailed to the customer, and it can be viewed in the administrator panel.
We want the success page to show a receipt so they see exactly what they bought, and exactly what they paid, and a link to the My Account page so if there is a problem they can cancel their order.
I *THINK* you'll be able to re-use the ajax library that shows you the order detail in the back end, and just stick it in the success page - more or less..