Complete the dialogue with the correct form of the verbs in brackets.

Joe Excuse me, how much (1) (be) this T-shirt?
Assistant It (2) (be) £8.99.
Layla That looks great, Joe, and it’s cheap. I (3) (buy) a similar T-shirt last week and it (4) (be) more expensive. How much (5) (be) these earrings?
Assistant They (6) (cost) £6.
Joe Let’s buy the T-shirt and the earrings. I’m paying!
Layla But Joe, that’s a lot of money!
Joe It (7) (be) your birthday last week and I (8) (forget).
Layla Oh, OK. Thanks, Joe!