The Lakeshore Hotel's occupancy-days and custodial supplies expense over the last seven months were as follows: Custodial Occupancy Supplies Month Days Expense March 18,800 $17,540 April 13,140 17,680 May 15,960 19,450 June 30,900 24,750 July August 28,800 30,560 20,000 23,050 September 16,100 21,020 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 "Fixed cost" to the nearest dollar amount and "Variable cost" to 2 decimal places.) Y= X