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

### Instruction:
The price of electricity went up by 25%.  John's old computer used 800 watts and his new computer uses 50% more.  If the old price of electricity was 12 cents per kilowatt-hour, how much does his computer cost, in dollars, to run for 50 hours?

### Response:
 Kompyuta yake mpya inatumia watts 400 zaidi kuliko kompyuta yake ya zamani. Hivyo inatumia jumla ya watts 1200. Hiyo ni sawa na kilowatt-saa 1.2. Hivyo inatumia kilowatt-saa 1.2 x 50 = 60. Umeme sasa unagharimu senti 15 kwa kilowatt-saa. Hivyo anacholipa ni senti 15 x 60 = 900 kwa kilowatt-saa. Hivyo anacholipa ni $9.