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Most of the grocery stores in my area have them, and I have seen before where the line for the self-checkout was longer than the normal lines (that struck me as odd). Especially when one person is shoving pennies into one of the machines, and another is arguing with the attendant about a credit card that is not working. If I have fewer than 15 items I simply look for the quickest route out of the store, or the cutest cashier.
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