That calculation works great to avoid showing large quantites in the cart, where you will be ordering "1 set of 20" or "1 set of 40" and the final price would be calculated by the total quantity.

My issue is that if you order a set of 20 cards, they are \$.75 each. If you order 40 cards, they are \$.72 each, and so on. I was attempting to have my select list determine the price, since I can't simply do the quantity times price for my total price. However, maybe I should do the item "sold in sets of 20", where the customer will type the quantity in the text field as usual, only a "2" means "2 sets of 20", and then create a discount where if they order a certain quantity of itemcategory2 (for greeting cards), then subtract a certain amount of money. Is there an easy way to create a discount based on a category number instead of an item number?

Otherwise, I can set the value of the quantity text field for cards to be 1, and then do a calculation for quantity times the price plus the additional price determined by the select list (20 cards are 15.00, 40 cards are 29.00, etc.).

Thank you so much for helping me with this - I know it's confusing. I'm thinking the easiest way to go is to not offer a quantity discount on greeting cards and then I'd be set!