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

### Instruction:
A gym charges its members $18 twice a month.  If it has 300 members how much does it make a month?

### Response:
Each person is charged 18*2=$<<18*2=36>>36 per month
So each month they get 36*300=$<<36*300=10800>>10,800
#### 10800