Daniel and Elizabeth had to choose between making a 600-mile round trip by car or plane. Round-trip airfare was $260 for each of them and would take 2 hours. Round-trip cab fare to the airport would add $15. Driving their car would take 2 days each way and would add the cost of gas, food, and lodging. Elizabeth estimated that gas would cost $60, that food would be $25 per day (4 days) for each of them, and that lodging would be $48 for each night of the 2 nights they would stay in a motel. Find the average cost per passenger-mile of flying.

Question

Daniel and Elizabeth had to choose between making a 600-mile round trip by car or plane.  Round-trip airfare was $260  for each of them and would take 2 hours.  Round-trip cab fare to the airport would add $15.  Driving their car would take 2 days each way and would add the cost of gas, food, and lodging.  Elizabeth estimated that gas would cost  $60,  that food would be  $25  per day (4 days) for each of them, and that lodging would be  $48  for each night of the  2  nights they would stay in a motel.   Find the average cost per passenger-mile of flying.