hi, I want to set up payment processor like the below one, https://www.paypal.com/us/cgi-bin/w...8f5a5f5ae42e779d4b5655493f6171509c5b2ec019b86 That is, the customer should be able to enter their wished quantity (no. of item) and the price should be calculated automatically according to the items entered, like show in the above link. You can notice that they can update totals. Can anyone tell how to set up or get this payment processing link on my website. Another thing is, After the client makes the payment they should be taken to my website to fill out the instructions about the order which will to emailed to my email address. So which will be better, Standard Website Payment or Express Check out Kindly help me in the matter.