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

### Instruction:
Rookie police officers have to buy duty shoes at the full price of $85, but officers who have served at least a year get a 20% discount. Officers who have served at least three years get an additional 25% off the discounted price. How much does an officer who has served at least three years have to pay for shoes?

### Response:
 Afisa ambaye amehudumu angalau miaka mitatu atapata punguzo la 20% kwenye bei kamili ya $85, ambayo ni $85 x 0.2 = $<<85*0.2=17>>17.
Kisha wanapata punguzo la ziada la 25% kwenye bei iliyopunguzwa ya $85 - $17 = $<<85-17=68>>68, ambayo ni $68 x 0.25 = $<<68*0.25=17>>17.
Hivyo, afisa ambaye amehudumu angalau miaka mitatu atalipa $68 - $17 = $<<68-17=51>>51 kwa viatu.