Great deal on grapes at Cub

For the second time in the past month, Cub grocery stores has an amazing deal on grapes. They have a coupon on the first page of their circular for a free pound of grapes. Basically if you buy grapes and use the coupon, they will deduct the cost of one pound. I make sure to pick a bag of grapes that is just one pound of a little over, so it's free or almost free. If you go through the self check-out lane, they don't take the coupon away, so I have already used the coupon a couple times. Fruit salad anyone?