In an electrically heated home, the temperature of the ground in contact with a concrete basement wall is 10.0oC. The temperature at the inside surface of the wall is 22.0oC. The wall is 0.17 m thick and has an area of 7.1 m2. Suppose that one kilowatt hour of electrical energy costs $0.10. How many hours are needed for one dollar's worth of energy to be conducted during the wall?