Is it possible to generate an invoice as the result of selections made on a form.

I have an application form that results in the applicant owing $25.00.  Is there a way to generate an invoice that would be sent in the auto response email to the applicant.

I'm afraid you'd have to use a Payment Processor instead. We don't have an option to send out invoices to your respondents. Payments are usually done upfront, right on the form upon submitting (or to be done later through Payment Authorization).

To get a better idea, here's the complete list of all Payment Processors we integrate with. Now, since we have no clue what you'd prefer to use, I recommend you read this article on Which-Payment-Processor-is-Right-for-Your-Business 

If you don't want your respondents to be charged as soon as the form is submitted, then your only option would be to enable Payment Authorization. This feature is only available with PayPal, Stripe, and Authorize.Net.

Complete guide: How-to-Enable-Payment-Authorization