Coupon Code RSFormPro

I'm curious to know if you are able to add a coupon code to RSFormPro + Paypal? I have a client who wants to provide a coupon code to select customers so they can complete the form, submit the code, and pay a lower price. This code will be used with Email Marketing and Social Media Marketing.

Also, this upgrade will probably be a hot sell for a lot of people looking to buy RSJoomlaPro. Food for thought!

Thanks,

- Sean