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

### Instruction:
John drives 1000 miles a month.  He needs to get an oil change every 3000 miles.  He gets 1 free oil change a year.  If an oil change costs $50, how much does he pay a year?

### Response:
 Anahitaji kufanya mabadiliko ya mafuta kila baada ya maili 3000/1000 = <<3000/1000=3>>3 miezi.
Hii inamaanisha anapata mabadiliko ya mafuta 12/3 = <<12/3=4>>4 kwa mwaka.
Hivyo anatoa gharama ya mabadiliko ya mafuta 4-1 = <<4-1=3>>3 kwa mwaka.
Hii inamaanisha anatoa $3 x $50 = $<<3*50=150>>150 kwa mwaka.