When purchasing Green Power for commercial interior fit outs/Floor via the SF methodology, do you typically take the area of the entire space(including ac rooms, freight elevators, stairs,electrical rooms, etc etc) or just the occupied areas( offices, class rooms, hotel rooms etc etc). Also, can you take the gross square footage of the entire building and just divided by the amount of floors to get the average SF and just use that number, or it that not specific enough?