Le Chteau Joyal is an historic hotel in the heart of old Quebec City. It is owned by Riel Hotels, which operates additional properties in Halifax, Montreal, and Winnipeg. Le Chteau Joyal has 9 floors, with approximately 20 rooms per floor. Facilities also include a workout room, restaurant, and pool. The hotel is organized into 5 departments: front desk, engineering, housekeeping, food & beverage, and customer relations. As part of its operation, Le Chteau Joyal regularly incurs the following costs: General manager's salary Housekeeping supplies Utility costs Amortization on workout room equipment Advertising Food and beverage costs Amortization on restaurant equipment From the perspective of Riel Hotels, advertising specifically for Le Chteau Joyal is best described as a(n): Unit-level cost Customer-sustaining cost Product-sustaining cost Batch-level cost