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

### Instruction:
 John ameamua kuuza mfumo wake wa stereo. Mfumo wake wa zamani uligharimu dola 250 na alipata 80% ya thamani yake. Kisha ananunua mfumo ambao gharama yake ni dola 600 ambapo anapata punguzo la 25%. Ni kiasi gani cha pesa kilichotoka mfukoni mwake?


### Response:
 Alipata 250 * 0.8 = $<<250*0.8=200>>200 kwa mfumo wake wa zamani
Anapata punguzo la 600 * 0.25 = $<<600*0.25=150>>150 kwenye mfumo wa pili
Hivyo, gharama yake ilikuwa 600 - 150 = $<<600-150=450>>450
Hivyo, alitoka mfukoni kiasi cha $450 - $200 = $<<450-200=250>>250