How to link the form with PayPal?

I checked your form and I see that you inserted PayPal into your form, but the field is hidden:

You have to show it:

And integrate properly:

This guide should help as well: https://www.jotform.com/help/391-How-to-Integrate-Form-with-Paypal-Standard-

If you need any further assistance, please let us know.

Thank you!