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An app could be saving you precious time. Dragana Gordic / Shutterstock.com
You’re probably no stranger to the wrap-around lines that can form at the grocery store. Not even self-checkout lanes are exempt from this during busy hours. A new checkout method some grocery chains are implementing lets you opt out of standard and self-checkout lines altogether, though. All you need is a smartphone. So if you’re ready to walk in and walk out of a store without getting…