How do I pass the Final Total to Paypal?

[FuckTheJets]

I'm using Paypal to process all payments.

How do I send the final total to the Paypal terminal?
http://i.stack.imgur.com/iMali.png

When I click "Buy Now" it sends me to the Paypal terminal. But the total on the left still says $0.00
http://i.stack.imgur.com/07QpV.png

How do I send the "Final Total" ($107.99) to the Paypal site?

[x5tuts]

According to the update logs this project hasn't been updated in a while so I believe the paypal API may be out of date, i'll look into this issue for you.

[x5tuts]

plus the google checkout now does not work as its now google wallet, so i need to do a complete overhaul on the google checkout as well.