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

### Instruction:
John sells 20 woodburning for $15 each.  The wood cost $100.  How much does he make in profit?

### Response:
 เขาขายไม้เผาไฟได้ 20 x 15 = $<<20*15=300>>300
ดังนั้นเขาทำกำไร 300 - 100 = $<<300-100=200>>200