Christine Lynn travels from her home to a remote island. Her trip involves: car travel of 250 miles, air travel of 400 miles, and a boat ride of 75 miles. She is interested in calculating the average fuel cost per mile (per person) of her trip. Assume the fuel efficiency of car, air, and boat travel is 20, 0.40, and 3 miles per gallon, respectively, and that fuel cost per gallon is equal for all and is $3.00/gallon. She was alone in the car and among 180 people on the plane and 15 on the boat. What is the average fuel cost per mile, per person