Bayview Apartments is a 500-unit apartment complex. When the apartments are 90% occupied, monthly operating costs total $200,000. When occupancy dips to 80%, monthly operating costs fall to $197,000. The owner of the apartment complex is worried because many of the apartment residents work at a nearby manufacturing plant that has just announced it will close in three months. The apartment owner fears that occupancy of her apartments will drop to 50% if residents lose their jobs and move away.