The lakeshore hotel's guest-days of occupancy and custodial supplies expense over the last seven months were: month guest-day of occupancy custodial supplies expense march 4,000 $ 7,500 april 6,500 $ 8,250 may 8,000 $ 10,500 june 10,500 $ 12,000 july 12,000 $ 13,500 august 9,000 $ 10,750 september 7,500 $ 9,750 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.