 
 <prompt> Karen nikan ti wa ni awọn ẹya ọdun ti o wa ni aṣọ ọdun. Kan aṣọ n ṣe $300 ati yoo duro fun 15 ọdun. Aṣọ miiran n ṣe $120 ati yoo duro fun 5 ọdun. Bí o bá n lo aṣọ ti o dara diẹ lẹhin 30 ọdun, o yoo fi ẹwo ọja ní owo? <response>: First find the number of cheaper coats Karen will have to purchase over 30 years: 30 years / 5 years/coat = 6 coats
Then multiply that number by the cost of one cheaper coat to find the total cost of that option: 6 coats * $120/coat = $720
Then find the number of more expensive coats Karen will have to purchase over 30 years: 30 years / 15 years/coat = 2 coats
Then multiply that number by the cost of one expensive coat to find the total cost of that option: 2 coats * $300/coat = $600
Then subtract the total cost of the more expensive coats from the total cost of the less expensive coats to find the difference: $720 - $600 = $120

The answer will be 120. 