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

### Instruction:
 在一家咖啡店里，有7位顾客点了每杯5美元的咖啡，还有8位顾客点了每杯4美元的茶。这家咖啡店赚了多少钱？


### Response:
 咖啡店赚了7*$5 + 8*$4 = <<7*5+8*4=51>>51美元。