Creekside apartments is a 900-unit apartment complex. when the apartments are 90% occupied, monthly operating costs total $ 223 comma 360. when occupancy dips to 80%, monthly operating costs fall to $ 218 comma 320. 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 65% if residents lose their jobs and move away. assuming the same relevant range, what can the owner expect her operating costs to be if occupancy falls to 65%?