When I try to figure out totals, I add all the totals from the Grades section. These are extrapolated totals, a bit larger than the actual serial number totals in the appendix. Totalling up from the Appendix as Dean has done, will give a different total. The advantage of using the Grades section is that you can separtate the hammer from the hammerless. The problem with using the excell file is that the Appendix total was "hand picked" from order books and stock books. The excel files were created using only the stock books. The "hand picked" order book entries for eight gauges would have been excluded.
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