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

### Instruction:
John buys 3 dress shirts.  They sell for $20 each.  He also has to pay 10% tax on everything.  How much did he pay in total?

### Response:
 เสื้อเชิ้ตราคา 3*$20=$<<3*20=60>>60 ก่อนภาษี
ภาษีมีมูลค่า $60*.1=$6
ดังนั้นรวมทั้งสิ้นเขาจ่าย $60+$6=$66