Don't Read Conspiracy Into Checkout Scanner Slipups

I just read your article "Maybe they should call them `scammers"' (News: Analysis & Commentary, Jan. 16), about the inaccuracies and overcharging of consumers due to price scanners. I am a loss-prevention and security consultant, and one thing that has amazed me for years is signs at supermarkets stating: "If an item scans higher than the price marked, then it is free."

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