My brother has been doing sheetrock and painting work, mostly residential and bids the jobs by going in and measuring each wall space that he has to do. He has the chance to do 4 commercial jobs, finish the sheetrock and paint, each between 20,000 to 40,000 sq ft but can't figure out if he's supposed to bid on the floor space sq footage or the wall space sq footage. This could be his chance to really get going on his own and he's afraid of not bidding right, but we already know that a bid of 1.00 a sq foot is expected, just not if that means the sq footage of floor space or wall space. I hope this makes sense and someone can help really soon.