How to compound field values to a total/"My Products" field

Hello,

Can you please help me on compounding field values in a total/ "My Products" field for a total amount due after making their selections when completing the form?

Thank you!

You will first need to add calculation values to the options, please note that you need to enter a number, without any character. 

Related guide: https://www.jotform.com/help/301-How-to-Assign-Calculation-Value 

The next step will need to perform the calculation, the following guide will help you doing so: https://www.jotform.com/help/259-How-to-Perform-Form-Calculation-Using-a-Widget 

The last step will be to pass the calculated amount to the payment field, this guide will help you with that: https://www.jotform.com/help/275-How-to-Pass-a-Calculation-to-a-Payment-Field 

Please give it a try and let us know if you have any question.