PALM BEACH, Fla. — Scott Walker likes to tell a story about shopping at Kohl’s. Under instructions from his wife Tonette, Walker has learned how to pile on the discounts and coupons whenever he goes to the popular Wisconsin-based department store. If he sees a shirt on the rack with a tag that reads, “Was $29.99, Now $19.99,” Walker explains, he goes to the cash register with a flyer from the newspaper and gets another 10 or 15 percent off. Then he pulls out his Kohl’s credit card and there’s another 10 percent. And another newspaper flyer that might be worth as much as 30 percent off. “And the next thing you know, they’re paying me to buy that shirt!” Walker exclaims.