What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
If you meant using the calculation tool with integration to payment tools like paypal, -- it will not work.
The calculation feature is not integrated to any of the payment tools, this means that the calculated values will not be processed by any of the payment processor.
Hope this answers your question. Inform us if you need further assistance.