We can rent a boat for x cents per minute for the first 60 minutes and then y cents for each additional minute. How much will it cost to rent a boat for z minutes, where z>60?  Pick.
A) x + 60y
B) 60x+(z-60)y
C) x + zy
D) 60y+(z-60)x
E) 60x + zy
The first 60 minutes cost 60x.   The next (z-60) minutes cost (z-60)y.   The total cost is 60x+(z-60)y.   The answer is 60x+(z-60)y.
<result>B</result>
We can rent a boat for x cents per minute for the first 60 minutes and then y cents for each additional minute. How much will it cost to rent a boat for z minutes, where z>60?