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Using Paypal ExpressAsked by IlluminousAustralia on April 08, 2015 at 09:28 AM
If you changed first part of problem like my colleague suggested in original thread:
then after changing text box you need to change calculation inside of Calculation widget to take right value of new field.
After saving form functionality will work as you are expecting.
Hope this will help. Let us know if you need further assistance.