Some Stores Are Testing A New Checkout System That Allows Shoppers To Use Their Mobile Phones To Scan Items As They Walk Through Stores And Pay At Self-service Kiosks - Skipping The Cashiers' Lines. The New Mobile Checkout System Is Intended To Reduce Long Lines And Customer Wait Times In Stores. What Does The Second Sentence Do?

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Some Stores Are Testing A New Checkout System That Allows Shoppers To Use Their Mobile Phones To Scan Items As They Walk Through Stores And Pay At Self-service Kiosks - Skipping The Cashiers' Lines. The New Mobile Checkout System Is Intended To Reduce Long Lines And Customer Wait Times In Stores. What Does The Second Sentence Do?






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