Valie Crucis Cabins has 9 units for rent. In July, all units were rented for all 31 days of the month. The July utility bill was $2400. In February, 7 cabins were rented for 10 days each. The February utility bill was $728. In April, 8 cabins were rented for 14 days each and the monthly utility bill was $990. Use the high-low method to determine the estimated fixed cost component of the company's utility bill. $168 50 $728 $104