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

### Instruction:
Jim buys a package of 20 car washes.  Since He bought a package he only has to pay 60%.  A carwash normally costs 15 dollars.  How much did he pay for the package?

### Response:
 ค่าล้างรถของเขาคือ 20 x 15 = $<<20*15=300>>300
ดังนั้นเขาต้องจ่าย 300 x 0.6 = $<<300*.6=180>>180