Asking About Prices

1. A: Excuse me. How much is this sweater?
   B: Which one?
   A: The blue one.
   B: It's $ 13.99
   A: Oh, that's very cheap.
2. A: Excuse me. How much are these pants?
   B: Which ones?
   A: The dark blue ones.
   B: They're $ 199.99
   A: Oh, that's rather expensive.