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

### Instruction:
John buys 500 newspapers.  Each newspaper sells for $2.  He sells 80% of them.  He buys them all for 75% less than the price at which he sells them.  How much profit does he make?

### Response:
 Anauza 500*.8=<<500*.8=400>>400 magazeti
Anapata $400*2=$<<400*2=800>>800
Anaweza kununua kwa $2-1.5=$<<2-1.5=.5>>.5
Hivyo anapata punguzo la $500*.5=$<<500*.5=250>>250
Hivyo anatumia $500-250=$<<500-250=250>>250
Hii inamaanisha faida yake ilikuwa $800-250=$<<800-250=550>>550