What my time is worth...
about 4 boxes an hour once I get going. :-)
The final dimensions that I chose were 21.5 x 10.5 x 3.5. Most of those tolerances are pretty tight if it is going to work at all. Total time spent, including locating materials is about 4 hours. Cost about $40, most of which was purchases like a stapler, good metal ruler, and hobbyist knife which I will probably find other uses for in the future. The result is ugly, but functional.
Cheers,
Ben
"... I couldn't see how anyone could be educated by this self-propagating system in which people pass exams, teach others to pass exams, but nobody knows anything."
--Richard Feynman
