How do I set up paypal to charge a certain amount?

[dukevin]

I have a website that calculates the cost of everything in PHP.  How can I make it so when the user clicks on the Paypal button, they are charged the amount I specify in PHP?

[snowshoe]

Suggest visiting the Developer's Forum, you should be able to find some answers there. (This forum is less technical in nature.)

http://stackoverflow.com/questions/tagged/paypal

Here's a post from there that you may find interesting:

http://stackoverflow.com/questions/7188401/paypal-php-integrate-a-paypal-payment-into-a-website