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Stirling generally works in his store’s express checkout lane, where customers buy 12 items or fewer. “Speed is really essential to make sure the line doesn’t build up beyond two or three people,” he says. And customers who meticulously count out change can slow down the process significantly. The supermarket worker prefers shoppers who use contactless credit or debit cards, simply tapping and going without much fuss.
A study by the National Association of Convenience Stores, an American trade body, estimates that counting out pennies can add up to 2.5 seconds to every cash transaction. That isn’t a significant amount in and of itself, but multiplied millions of times a day, it can have an impact on productivity.
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