Can I select a product based on another field?

Can I have the Payment amount match the number of people registered on my form? I would like the form to choose the correct registration payment instead of the user choosing which registration payment they want to pay for.

You cannot force the payment field selection based on another field. You may consider moving the payment field to the top of your form, then switching the show conditions to the payment field instead.

If you need any further assistance, please let us know.