We aren't trying to be evasive...
Well, maybe we are. I doubt anyone in NYC, who may be bidding against you will want to give you a low number here, and if they do, you might not want to trust it.
There are a lot of labor variables that effect how much a run will cost the contractor that can't be determined site unseen. Are you trying to drop cinder block walls, or are piped boxes being provided for you? Are there cable trays in the ceiling, or are you providing J hooks every 4 feet? How long are the runs?
All the rest is and accounting question- How much can you afford to shave your profit margin?