I'm writing my proposal for Office Cleaning. I'm having a hard time figuring out how much to charge per sq ft for a 4000sq ft, 800 sq ft, and 6500 sq ft medical offices. They supply the products and equipment. I just have to do the general Dusting, sweeping, mopping, and trash removal. It's 5 days a week in the evening and should take up to 4-5 hours per night for all three offices. I'm in Va.