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

### Instruction:
 一家健身房每月向会员收取两次18美元。如果有300名会员，它每月能赚多少钱？


### Response:
 每个人每月收费18*2=$36。
所以他们每个月能赚36*300=$<<36*300=10800>>10,800。