David was having a quiet grothing session at home by himself while the mrs and kids went shopping, he was unaware that she forgot her purse. She ran quickly into the house to get her purse from the kitchen and found David in the heights of grothing on their dining table......
"OH MY GOD?!! WHAT THE FUCK IS WRONG WITH YOU DAVID??!!!!!! I told you not to be grothing all over the house!!!! Your paying for the cleaner this time!!!!! I hope you save that for our churting session in Thursday....."
Grossing factor relates the Rentable square footage, which includes common area space such as hallways, common bathrooms and possibly lobbies; to the useable square footage, which includes only that space which you would specifically occupy for your buisness needs, ie - the area you can carpet. The grossing factor is usually listed as a %.