The Lakeshore Hotels guest-days of occupancy and custodial supplies expense over the last seven months were:

Month	Guest-Days of Occupancy		Custodial 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:
1.	Using the high-low method, estimate a cost formula for custodial supplies expense. (Round the Variable cost per guest-day to 2 decimal points.)

	Guest days	custodial supplies expense
High activity level
low activity level
change
Variable cost per guest day		per guest day
fixed cost per month

Using the cost formula you derived above, what amount of custodial supplies expense would you expect to be incurred at an occupancy level of 11,300 guest-days? (Do not round your intermediate calculations.)

Variable cost
fixed cost
total cost