购物用语 How much is it? — 英语阅读题

At a small shop, Mia sees a blue hat. She asks the shop worker, “How much is it?” The worker says, “It is twenty-four yuan.” Mia also sees a red bag. She asks, “How much is it?” The worker says, “It is thirty yuan.” Mia likes the blue hat. She asks about its price again, and the worker gives the same answer. What does the worker say about the price of the blue hat?