How can I pass a calculation to the payment field?

I have a form that calculates a total price based on the options a person selects throughout a form.

When I try to set a defined amount in payment settings the "Get Price From" only has the None(Manual) option available.

Am I doing something wrong?

 All good, I fixed it. I needed to set up a form calculation widget.

That's correct - You indeed need to have a Form Calculation Widget added to your form. That's the field you will use to fetch the amount for the GET PRICE FROM option on your payment field.

This and more were discussed in great detail on the guide I'm linking below. I figured this would help in the future in case you need guidance on how to set this up.

Complete guide: How-to-Pass-a-Calculation-to-a-Payment-Field