i want to integrate google check out in my website,,i m a bit confused in which option i should go with..there are four options to integrate with the website.
1.Email invoices
2.Buy Now buttons
3.Google Checkout shopping cart
4.Third-party shopping carts
now in my website i calculate the total order and stores it in a variable. i want that there should be a pay button on which when user clicks, the total price is retrieved and passed to google check out..the best option i find is BUY NOW BUTTON but rather it should be pay now button,,give me idea how can i proceed