As the building manager,I am at constant odds with a cleaning service over the amount of porters they provide for my facility. Their montly evaluation is always poor and the quality of their service is,under my opinion, substandard. At one time 12 years ago, the previous service had 25 porters to clean my facility. This service provides 10 on a good day. It was bid at 14. What is the correct number peruare foot of a faciltity this size?