Unofficially revealed news (from AMD) says that Windows 10 will finally ship in late July. And as Microsoft announced before, Windows 7/8/8.1 users will be able to install Windows 10 for free during the first year.
Before I moved I was paying $60.00 per week for a 3,400 sq. ft. house with lots of clutter. It took 2 ladies about 3 hours and the cleaning was decent but not great. That was in Los Angeles County. When I moved out of state, I had a one time cleaning of an empty 3,500 sq. ft. home. They charged $25.00 per hour and estimated 6 - 8 hours.
Daily office cleaning rates in urban areas may cost approximately ten cents per square foot for every hour the professionals are on site. If you own a 15,000 square foot office building you can expect to pay several thousand dollars a month for daily (nightly) services. Some companies give their clients a fixed rate.