I've found the NPE to be very low every time I've consulted it. It can be a decent resource but you are much better off coming up with your own pricing structure. This way you can focus on true numbers that incorporate the realities of certain projects, projects that start from the moment you get a phone call and end the moment you cash the check . . . also just checked another one I use sometimes: Hometech Remodeling and Renovation Cost Estimator, 2005. They have $.18 to sand and fill, $.40 to caulk, and $.53 to paint two coats, so $1.11, includes material (as did my $1.75).
Mack