When I 1st started using Meijer mealbox coupons, I thought they weren’t ringing up because it would appear at the bottom of the register screen as zero (CM 0.00). If you watch the screen when they scan the coupon, it will quickly scroll/flip around. It places the coupon amount under the particular product that it is for. So if the coupon is $1/2 boxes of crackers. Under each box of crackers there will be a subtracted amount for $0.50. The best way to make sure it’s properly subtracting is to watch the total at the bottom of the screen and make sure it’s going down as the coupon are scanned. HTH.