Sathish is going on a 2100-kilometer road trip with 2 friends, whom he will pick up 150 kilometers after he begins the trip and drop off when there are 150kilometer remaining. The car consumes 6 liters of gas for every 100 kilometers, and gas costs $1.20,
Sathish will pay for all of the gas when he is alone in the car, but he and his friends will split the cost evenly when they are together.