If a person buys multiple units of a product, the offer code should apply to each unit bought. it's only taking a discount off of 1 product. If a patient is using more than 1 unit, we have to go in and manually add a discount, which defeats the purpose of the offer code.

i.e. patient wants to purchase 2 syringes of filler. we have an offer code that's $100 off each syringe. When the patient is being checked out for 2 syringes, it's only taking off $100, not $200.