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

### Instruction:
 约翰和他最好的朋友史蒂夫一起买了12个杯子蛋糕。每个杯子蛋糕的价格是1.50美元。如果他们平均分摊费用，每个人付了多少钱？


### Response:
 杯子蛋糕的总费用是12*1.5=$<<12*1.5=18>>18
所以他们每人付了18/2=$<<18/2=9>>9