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

### Instruction:
 南希想为家庭聚会做花生酱饼干，但她的表弟对花生过敏。她决定做杏仁酱饼干代替。一罐杏仁酱的价格是花生酱的三倍。做一批饼干需要半罐酱。一罐花生酱的价格是3美元。相比花生酱饼干，做一批杏仁酱饼干多花费多少美元？


### Response:
 杏仁酱的价格是花生酱的3倍，即3 * 3 = 9美元。
做一批饼干需要半罐杏仁酱，即9美元/2 = 4.5美元。
花生酱的价格是3美元。
因此，做一批杏仁酱饼干比花生酱饼干多花费1.5美元。