Shopkeeper: Good morning. May I help you? George: I want to buy a T-shirt. Shopkeeper: Which colour and size do you like, Sir? George: Yellow, I like the yellow one and medium-sized. Shopkeeper: O.K. Medium-sized, yellow. Here you are. George: How much is it? Shopkeeper: 25 U.S dollars. George: Oh, it is too expensive. What if I give 20 U.S dollars? Shopkeeper: How about 23 U.S dollars? George: O.K. Shopkeeper: Here you are. George: Here you are, 25 U.S dollars. Shopkeeper: Here is your change, 2 dollars. Thank you, Sir. How much did George pay for the T-shirt?