Long's Drugs uses a simple letter/number code to indicate on its price tags the wholesale cost for each item on sale. The code has been cracked [via]{style="FONT-STYLE: italic"} [Boing Boing]
The substitution at Long’s is CHARLESTON (where C = 1, H = 2, etc.). Wal-mart’s code is still unbroken. Where’s Alan Turing when you need him?
Update: Wal-mart uses BRUSHCLEAN. No word on the use of a bombe for decoding.