Dan,
Many framers use a commercial point of sales software package while many others have developed spreadsheets for determining their pricing. I use spreadsheets. I believe that they are much more flexible and certainly a whole lot cheaper than plunking down cash for a dedicated computer and paying for software which requires you to do business like the programmer/framer decides you should. (No flames, please!)
Determining equations for those spreadsheets is, of course, an individual process, and no one can give you an absolutely definitive answer as how to proceed – you are likely to get 10 different approaches from 8 different framers.
However, that said, I have written a tutorial (as yet unpublished) to guide framers who choose to use spreadsheets in their pricing. If you are interested e-mail
bill@framersloft.com and I can send you what I have written.
As far as dust covers are concerned – again different framers use different approaches. For wood frames, I use Elmer’s Glue to run a bead of glue around the perimeter of the frame, overlap the back with black Kraft paper, then trim the excess off with a specialized “fitting” knife. Others use ATG tape which I find to be too expensive to use; or a type of masking or duct tape in lieu of Kraft paper to seal the back of the frame, which, I believe, is too expensive, too. Plus I find that Elmer’s glue can be more easily removed than can other adhesives.
Since the corners of metal frames are only held together with hardware and are not airtight, there is no easy, practical way to seal them – most framers don't bother.
[ 10-22-2003, 10:22 AM: Message edited by: Bill Henry ]