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

### Instruction:
 John anauza vitu vya kuchoma kuni 20 kwa $15 kila kimoja. Kuni zinagharimu $100. Anapata faida kiasi gani?


### Response:
 Anauza vitu vya kuchoma kuni kwa 20*15=$<<20*15=300>>300
Hivyo anapata faida ya 300-100=$<<300-100=200>>200