OK, I'm pretty good at bidding & I've got a pretty good closing ratio, but pretty much all we do are residential repaints, some small condo projects, and only basic commercial stuff; ie the easy ones. I've just completed a Credit Union exterior for my wife's employer; it was mostly just a big house & fairly straight forward. I'm now their go to guy for painting services as their a loyal company who prefers to work with the same guys over & over once things are done right. My problem is they want me to give them a number to re-stripe their parking lot. I've got access to the sprayer, my sales rep's got me a price on materials, I've got guys who work for me who've done it before, but I don't have a clue as to how to bid it. I'm not looking to max it out, but I don't want to low ball it either, I just want to land somewhere in the upper third & the job's mine to lose. Any advice out there on how you calc it out, other than the obvious T&M?