Is it possible to put a payment in your form so my clients can pay me directly?

Hello,
I was able to access my forms and I deleted the option to upload. I wanted to know if its possible to put a payment in your form so my client can pay directly on the jot form? Is this allowed? I just want verify first.
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Yes, it's possible. We have a few payment integrations you can choose from. We have Paypal, Stripe, Authorize.net, and more in the form builder.

Please read the following guide for more details about our payment integrations:

https://www.jotform.com/help/323-Mastering-Payment-Form-Integrations-with-JotForm 

Do you have a payment gateway that accepts bitcoin?
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I'm sorry, but we do not have one that accepts bitcoin. We only have the providers given in the previous link, and they only accept debit/credit card payments. 

I need assistance because price varies on the type of corporations they choose and prices change depending on what corporations are available. How can the client input the price and make a payment? Which payment gateway allows this?
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thank
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We have the calculation feature that you can take advantage of to provide your clients the option to input an amount and pass it to a payment field. Most of our payment integrations support a User Defined Amount.

Guide to calculate: https://www.jotform.com/help/259-How-to-Perform-Form-Calculation-Using-a-Widget.

Guide to pass the calculation to payment field: https://www.jotform.com/help/275-How-to-Pass-a-Calculation-to-a-Payment-Field.

Note that you can also set up the form to have a dropdown or single or multiple selections. These fields are capable of having a calculation value for its options, which you can pass or calculate into the calculation widget.

Guide to assign a calculation value: https://www.jotform.com/help/301-How-to-Assign-Calculation-Value. There is a demo form at the bottom of this guide that you can check.