The Westin Hotel's guest-days of occupancy and custodial supplies expense over the last seven months were: Guest-Days Custodial Month of Occupancy Supplies Expense March 7.000 $10,200 April 6,500 $10,100 May 9,000 $10,600 June 10,500 $10.900 July 12,500 $11,300 August 11,500 $11,100 September 9,000 $10,600 Guest-days is a measure of the overall activity at the hotel. For example, a guest who stays at the hotel for three days is counted as three guest-days. Required: Using the high-low method, estimate a cost formula for custodial supplies expense 1. indicating total fixed costs and variable cost per guest-day. Compute the total amount of custodial supplies expense you would expect to be 2. incurred at an occupancy level of 11,300 guest-days