I have a website where people make orders and then the payment is done through PayPal, the payments are of varying size, and the code for the PayPal pay button is generated with PHP. What I would like is to be able to know the ammount of mony that they payed with PayPal. Right now I have a custom field in the PayPal form that is the ammount that they owe. I then want to be able to retrieve this value. I tried using a POST on the return page, but it didn't work. Any suggestions?