Nathan wants to buy a sweatshirt and is trying to determine the better buy. He has a 20​% coupon for the​ in-store purchase. The store charges ​$44 for the sweatshirt he wants.​ However, he found the same sweatshirt online for ​$38 and gets 15​% off as a​ first-time buyer. There are no shipping charges. Which is the better​ buy? By how​ much? Use the Polya problem solving method to solve this problem.