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

### 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:
 Ameuza jumla ya mikate 5 + 7 = <<5+7=12>>12 hadi sasa.
James anahitaji kuuza mikate mingine 18 - 12 = <<18-12=6>>6.