A heat pump is used to extract heat from the outside atmosphere to heat the inside of a building. On a day when the outside air temperature is Tc°C, the heat pump is operating to a COP of 3.9, maintaining the inside temperature of the building at Th°C. If the building is losing heat at the rate of 67,030 kJ/hour in these conditions, determine how much power (kW) must be supplied to a heat pump? Keep two decimal places.