Meijer is turning a past headache at the checkout lanes into a $10 coupon that customers can use Friday or Saturday. The coupon is good for $10 off a $50 purchase on grocery, health and beauty items or general merchandise. Frank J. Guglielmi, senior director of communications for the Grand Rapids, Mich.-based retailer, said an outage affected the retailer's ability to process credit cards. He noted it was an internal IT issue. The glitch in late February disrupted the point-of-sale system at stores for debit and credit card purchases.