Would be useful to be able to have multiple items at various % off or $ off when creating a single coupon.

We are creating a sales flier which will be mailed out to 4000+ customers. This flier will have anywhere from 10 - 20 items all at various % or $ off. It would be exceptionally easy for our customers if they were able to add the items to their cart then simply enter a single coupon code to take advantage of the promo pricing on the flier.