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 18,400 $ 22,480 April 12,900 21,260 May 15,400 20,790 June 29,900 30,420 July 24,400 27,560 August 19,400 23,230 September 14,900 21,330 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.)