It's wrong to take advantage of stores' return policies.
Mark has too much winter clothing.
Mark wants to get rid of some of his clothes.
Mark donates some sweaters he doesn't need to Goodwill.
Mark takes several sweaters he didn't buy at a store to a store and complains that he wants to return them for a full refund.
Someone who needed a warm sweater but otherwise couldn't afford it is able to buy one.
Mark is accused to trying to defraud the store and has to go home with all the sweaters.