To solve this problem, first total Benito's operating expenses which is equal to operating expenses = $832 + $177 + $140 = $1,149. Then subtract it from the total expenses to get the cost of gasoline. Cost of gasoline = $1,743 - $1,149 = $594. Then, divide the gasoline cost with the total miles Benito drove to get the average cost of the gasoline per mile. So, average cost of gasoline per mile = $594/8,871 miles = $0.067 or 6.70 cents. Answer is B.