A 350 -room hotel ran 74.9% occupancy in the month of September (7,862 room nights occupied), with an ADR of $188.84 and total room revenue of $1,484,690. Hourly wages incurred by the housekeeping department are as follows: How many guestrooms were serviced and/or inspected by housekeeping supervisors per hour (RPLH)? \begin{tabular}{c} 21.6 \\ \hline 0.046 \\ \hline 1.8 \\ \hline 0.87 \end{tabular}