Looking for solution so that the customer pays our fees to validate membership

I am looking for a solution so that the customer pays our fees to validate the membership, I spent a lot of time this afternoon by doing users test without much success can you give me indications?

https://eu.jotform.com/build/30116235216946

Hello, 

You can check the list of our payment processor apps on this link: https://www.jotform.com/integrations/category/payment-processing

To collect payments using JotForm, please follow this guide: https://www.jotform.com/help/165-Setting-Up-Your-First-Order-Form

If I misunderstood your question, please provide more information about the issue so we can assist you properly.

Thank you.