The Lakeshore Hotels occupancy-days and custodial supplies expense over the last seven months were as follows: Month Occupancy-Days Custodial Supplies Expense March 18,700 $ 15,480 April 13,060 15,640 May 15,840 18,260 June 30,600 24,200 July 28,200 30,360 August 19,600 22,130 September 15,900 19,870 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