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.
You were almost there. Just a few changes needed:
1. Add one Form calculation field that will receive result from Conditions you already made:
So you will do that for both conditions.
2. Then, in PayPal wizard change Get price from to be your calculation field:
That's it, that will do the calculations as you wish. You can also make your calculation field hidden since it is not necessary for your customers to see it.
If you have further questions please let us know.