I am trying to create a seamless way for users to select an amount to donate OR enter their own amount using the radio buttons with the authorize.net add-on. Is there a simple way to do this?
Right now, I have two separate fields for the radio option and the product field:
https://stephenlevin.com/online-donations
I would like to have something like this where the last field is an open option:
https://www.melwymore.com/contribute/contributecreditcard