Ученик А: How much is this jar of jam, please?
Ученик B: It's sixty pence.
Ученик А: Here's a pound.
Ученик B: Thank you. Here's your change, forty pence. (100p - 60p = 40p)
Ученик А: How much is this carton of orange juice, please?
Ученик B: It's one pound and ten pence.
Ученик А: Oh, I only have one pound.
Ученик B: That's okay. I can't sell it to you for just one pound.