You drove an 800 gallon tank truck of water from the base of Mt. Washington to the summit and discovered on arrival that the tank was only half full. You started with a full tank, climbed at a steady rate, and accomplished the 4750 foot elevation change in 50 minutes. Assuming that the water leaked out at a steady rate, how much work was spent in carrying water to the top? Do not count the work done in getting yourself and the truck there. (Use the value that water weighs 8 pounds per US. gallon.) Leave your answer exact