English to French Other Tourism & Travel

Rooms expense consists of items relating to the sale and upkeep of guest rooms and public space. Salaries, wages and employee benefits account for a substantial portion of this category. Although payroll varies somewhat with occupancy, because managers can schedule room-cleaning staff, porterage personnel and house cleaners to work when occupancy requires, much of a hotel’s payroll is fixed.
Other rooms department expenses include the cost of cleaning materials, commissions payable to travel agents and reservations costs. The rooms expense for the Hotel have been estimated to be US$107 POR in the stabilised year in future values.

je ne comprends pas bien ici, comment se fait-il que l'hôtel doive payer des frais de réservation ? ou alors il s'agit d'autre chose ? merci !