The Peak View Hotels occupancy-days and custodial supplies expense over the last seven months were as follows: Month Occupancy-Days Custodial Supplies Expense March 18,300 $ 22,360 April 12,800 21,095 May 15,300 20,655 June 29,800 30,315 July 24,300 27,445 August 19,300 23,110 September 14,800 21,185 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.)