Service costing question (Kaplan)

A hotel calculates a number of statistics including average cost per occupied bed per day.
The following information is provided for a 30?day period.
Rooms with twin beds Single rooms
Number of rooms in hotel 260 70
Number of rooms available to let 240 40
Average number of rooms occupied daily 200 30

Number of guests in period 6,450
Average length of stay 2 days
Payroll costs for period $100,000
Cost of cleaning supplies in period $5,000
Total cost of laundering in period $22,500
What is the average cost per occupied bed per day for the period?
A $9.90
B $9.88
C $7.20
D $8.17