Walmart's price match policy does state that an ad from their competitor is required and that some restrictions apply. It also says some restrictions apply fro coupons as well. I take that to mean that a coupon cannot be redeem for more than the value of the item. The policy states to see stores for details. I don't think it is right for anyone to receive money back from a coupon which, if you wish to redeem the full value of a $1 coupon for an item that is $.79, that is what you are attempting to do.