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.
What type of condition? If you want to show or hide the entire integration depending on a selection(outside the Paypal integration), you could apply something like this:
1) Click on Conditions, and select Show/Hide a form field
2) Create your condition
See how it works:
You can not create a condition inside the Paypal integration, however, you could use the Form Calculation widget to gather and pass the total result to the Paypal integration after you do your calculation and conditions: https://www.jotform.com/help/275-How-to-pass-a-calculation-to-a-payment-field