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JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.

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    How do I take this subtotal calculation and add it to the payment wizard at the bottom of the form to get a grand total?

    Asked by KCHDA on December 30, 2016 at 03:39 AM
    Also, how do I take this subtotal calculation and add it to the payment wizard at the bottom of the form to get a grand total?
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    JotForm Support

    Answered by Charlie on December 30, 2016 at 03:55 AM

    Unfortunately, you cannot pass a custom calculation to the payment wizard that has products setup on it. 

    If you want to pass a calculation value to the payment wizard, you need to change the "Payment Type" from "Sell Products" to "User Defined Amount". You can learn more about this on this guide: https://www.jotform.com/help/275-How-to-Pass-a-Calculation-to-a-Payment-Field 

    With that, you'll need to recreate the existing products on your payment wizard to the default form fields in the form. 

    I hope that helps.