Lee Anne and Mary got their allowance and went to their favorite store.

A. Lee Anne has $ 30 to spend and wants to buy 3 pairs of sunglasses. She estimates by rounding $ 14.72 to the nearest ten, which is $ 10 and then multiplying $10x3=$ 30. Is Lee Anne's estimate reasonable? Explain how you know.

B. Mary buys a pair of earrings and two bookmarks. She pays with a twenty-dollar bill. How much change will she receive?

C. The store is running a special deal- Buy 3 pairs of earring, Get one pair free! Lee Anne decides doesn't want sunglasses anymore. Will her 30 be enough to take advantage of this deal? Exp how you know.