Copy value from a total box to Paypal box

I have a total price box and need to copy that value to PayPal Payment Integration "subtotal"

I tried the form calculation but it will not pass the value.

Any suggestions?

password for form is: lotions

Cliff

Hello,

I create a clone of your form here https://form.jotform.com/210325690183956.

In order to get the amount from the user selection, you need to add a calculation field, copy the amount to it then ended to the PayPal field.

I create a screencast with the steps:

Thank you! :)