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

### Instruction:
James has 18 chocolate bars to sell for the swim team. He sold 5 last week and 7 this week. How many more chocolate bars does he need to sell?

### Response:
 เจมส์ได้ขายทั้งหมด 5 + 7 = <<5+7=12>>12 แท่งของช็อกโกแลตแล้ว
เขาต้องขายอีก 18 - 12 = <<18-12=6>>6 แท่งของช็อกโกแลต