What was the first product ever scanned with a UPC barcode in a retail store transaction?

In the world of retail, few inventions have transformed shopping as profoundly as the barcode. This simple pattern of lines revolutionized inventory management, checkout speeds, and data collection. But how much do you know about the origins of this ubiquitous technology that scans billions of products daily? Test your knowledge about this groundbreaking retail innovation that forever changed how we shop!

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A pack of Wrigley's chewing gum
A carton of Coca-Cola
A loaf of Wonder Bread
A package of Gillette razors