Below is an instruction that describes a task. Write a response that appropriately completes the request in Chinese. Please answer in Chinese.

### Instruction:
 苹果过去每磅售价为1.6美元。价格上涨了25%。一个4人家庭购买2磅苹果需要多少钱？


### Response:
 价格上涨使价格增加了1.6 * 0.25 = 0.4美元。
所以现在的价格是1.6 + 0.4 = 2美元。
购买了2 * 4 = 8磅苹果。
所以总共需要支付8 * 2 = 16美元。