Is there a way to add the calculation value from a single select to the payment field

Is there a way to add the calculation value from a single select to the amount due box within the Square Integration, rather that the customer having to make a selection AND enter the amount?

1) You will need to split your products into native fields such as "Single choice" or "Multiple Choice" fields, and assign a value to each option: https://www.jotform.com/help/301-How-to-Assign-Calculation-Value 

2) You can show the products based on the user's answers by applying conditions: https://www.jotform.com/help/316-How-to-Show-or-Hide-Fields-Base-on-User-s-Answer 

3) Then perform the calculations: https://www.jotform.com/help/259-How-to-Perform-Form-Calculation-Using-a-Widget

4) Pass the total to the payment field: https://www.jotform.com/help/275-How-to-Pass-a-Calculation-to-a-Payment-Field 

Let us know the form in question to guide you further.

Thanks.