Using numbers & drop down calculation to submit to Paypal

Hi 🙂 I’m using this plugin with the list drop down plug in to calculate the drop down field column. I have the number & drop down fields calculating the total properly, however I can’t seem to find where I can reference that field so I can use the total calculation to submit for payment to Paypal. Is there something obvious I’m missing here or is this not possible with this setup?

Thanks!

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