How to allow users to pay via PayPal or cash?

I have seen how you can give an option to pay via paypal or purchase order by making 2 forms, but that does not work for me in my situation. Is there a way to do it via conditions perhaps since my store is in the form itself and not an actual "store" through the "purchase order" option? 

For example would it be possible to enable the paypal option for people who select paypal by revealing the paypal store, and others just get a submit button because they selected cash? 

Thank you. 

You cannot add more than one payment integration o your form and you will need to create two different payment forms and then show it based on the condition. 

However, if you need to collect payments via check or cash, you could simply send the instructions to your submitter via email so he/she can send you the payment via that method. 

Also, you could set up the needed products and calculate the total amount in your form, then pass this total to the payment field, this way you will have all the purchase process without charging your customer via PayPal. This would require to set the products using basic fields. 

To get info about how to perform calculation on your form, please check this guide: How-to-Perform-Form-Calculation-Using-a-Widget

This guide will help you to pass the calculated amount to your payment field, in this case to PayPal integration and it will be shown only if your user decides to pay using a PayPal account. 

How-to-Pass-a-Calculation-to-a-Payment-Field

And this guide will help you to show/hide the payment field based on user's answer: How-to-Show-or-Hide-Fields-Base-on-User-s-Answer

If you have any question, please let us know.