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

### Instruction:
Paul makes pencils, making 100 pencils a day five days a week. He started the week with 80 pencils in his stock, and during the week he sold 350 pencils. How many pencils did he have in his stock at the end of the week?

### Response:
 Mwanzoni mwa wiki alitengeneza penseli 80 + 100 * 5 = <<80+100*5=580>>580 penseli.
Aliuza penseli 350 katika wiki hiyo, hivyo atakuwa na penseli 580 - 350 = <<580-350=230>>230 zilizosalia kwenye hisa yake.