Answer: The correct choice is the third choice.
First, lets look at the whiskers. They go out to the minimum and maximum. Our whiskers will need to go out to 11 and 32.
Second, lets look at the box. The range of the box is from 14 to 31 because those are the lower and upper quartile.
Finally, the middle line of the box is the median. In our case the median is 23.
These three facts lead us to chose the third option.
You're going to want to take the total, which is $353.00 and subtract the initial cost, which is $84.00, the number now should be $269. Using that total divide it by $68.00, there you should find your answer of about 4 hours. The precise answer is 3.99588235. But you would round that to 4 hours.