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

### Instruction:
 特洛伊做汤。他买了4磅牛肉和6磅蔬菜。蔬菜每磅2美元，牛肉的价格是蔬菜价格的3倍。一共花了多少钱？


### Response:
 蔬菜每磅2美元，所以蔬菜花费2*$6=$<<2*6=12>>12美元。
牛肉每磅$2 * 3 = $<<2*3=6>>6，所以牛肉花费$6 * 4 = $<<6*4=24>>24美元。
所以一共花费了$12 + $24 = $<<12+24=36>>36美元。