The Lakeshore Hotel's guest-days of occupancy and custodial supplies expense over the last seven months were: Guest-days of Custodial Supplies Occupancy Expense Month March 4.000 6,500 8,000 10,500 12,000 9,000 7,500 $ 7,500 $ 8,250 $10,500 $12,000 $13,500 $10,750 $9,750 April May June July August September 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. Using the high-low method, what amount of custodial supplies expense would you expect to be incurred at an occupancy level of 11,000 guest- days