I would like to set up a coupon so that a customer can choose a quantity of a product that is higher than one but that the coupon discount for that product will only discount one of the items. So they can buy, say, five of one item, and a coupon code will discount the specified amount from only one of the five. Right now, limiting the discount to 1 use per coupon will change a higher quantity to 1 only in the cart.

Any way to do that?