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i would like to know who develops their point of sale software... i've only built 3 POS systems before but all 3 had stringent requirements on prevention of this type of thing... if an updated price that was received from the imported data was larger than a certain percentage, update of that item was either held back and a notification sent, or in the simpler pieces, presented to the person handling the manual data import process. i'm actually extremely surprised something like this happened
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