Shouldn't this be in the Business forum?
That way we could steer you to small business classes.
These classes will teach you how to come to your "going rate", not someone else's going rate.
Installation pricing, is not something you grab from thin air, and lets get this straight right now, no two projects are the same, even if they are the same floor plan, right next door to each other.
Overhead + what you feel your time is worth and any extra, even a mark-up, or a fudge factor, divided by the sq.ft., Now you have your going rate, for your company, to stay in business.
But everyone knows that.