An ideal heat pump supplies heat energy to a house at the rate of 140,000 kj/h when the house is maintained at 25°c. over a period of one month, the heat pump operates for 100 hours to transfer energy from a heat source outside the house to inside the house. consider an ideal heat pump receiving heat from two different outside energy sources. in one application the ideal heat pump receives heat from the outside air at -10°c. in a second application the heat pump receives heat from a lake having a water temperature of 10°c. if electricity costs $0.09/kwh, determine the maximum money (in dollars and cents) saved by using the lake water rather than the outside air as the outside energy source. (do not insert $ in your answer and be accurate to the penny).