The Lakeshore Hotel's occupancy-days and custodial supplies expense over the last seven months were as follows: Custodial Supplies Month Occupancy-Days Expense March 11,100 $ 17,350 April 11,300 17,450 May 12,200 18,200 June 20,500 22,050 July 29,700 26,650 August 20,600 20,750 September 16,400 19,350 Occupancy-days are a measure of the overall activity at the hotel. For example, when a guest stays at the hotel for three days, it is counted as three occupancy-days. Required: 1. Using the high-low method, estimate a cost formula for custodial supplies expense. (Round the "Variable cost" to 2 decimal places.) -:-:- 2. Using the cost formula you derived above, what amount of custodial supplies expense would you expect to be incurred at an occupancy level of 15,800 occupancy-days? Variable cost Total cost