JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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.
You need to go to the submissions page for your form, this guide will help with that: How-to-View-Form-Submissions
Once you're in the submissions page you need to search the payment field, there you will find the product/s purchased, the paid amount as well as the payment info, here's a screenshot about how it looks:
I have checked your forms and noticed the payment fields are not required so may be that some of your submissions do not have this payment info and it means that there was not payment sent.
Please if you have any question, let us know.