Discount/promo codes on kiosks

Since only ten price types can be displayed w/n our kiosk's General Admission program, we think it would be helpful to add a box during the email/phone number page where they can put in a promo code or discount code that will apply to their order. We have these discounts already built for the website, already built within Altru, but when someone walks in the door to buy a ticket, since they aren't able to redeem those discounts on the kiosk, we have to check them in the old way, which confuses other visitors who don't really want to use the kiosk. We're also not getting that discount linked to a specific constituency since it's via Altru's Daily Sales