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

### Instruction:
 Justin alinunua jezi kadhaa. Alinunua jezi nne za mikono mirefu ambazo kila moja iligharimu $15, na jezi za milia ambazo kila moja iligharimu $10. Justin alinunua jezi ngapi za milia ikiwa alitumia jumla ya $80?


### Response:
 Jezi nne za mikono mirefu zinagharimu $15 x 4 = $<<15*4=60>>60.
Hivyo Justin alitumia $80 - $60 = $<<80-60=20>>20 kwa jezi za milia.
Hivyo, alinunua $20/$10= <<20/10=2>>2 jezi za milia.