Cleaning Rate for Apartment Complex Common Rooms?

What should I charge for cleaning at apartment complex in Jacksonville,North Carolina? I was told the number of rooms for the apartments and they accepted that price I charged, 17 cents per sq ft. Now they have asked that I clean the main offices and club house, a weight room, tanning room, and a full sized basketball court and two common restrooms the average size of a basket ball court is 94 x 50. I will have 2 workers. They want the basket ball court cleaned once a month. What should I charge?

By Michele