What was the first product ever scanned with a UPC barcode at a retail checkout in 1974?

The humble barcode has revolutionized retail and inventory management worldwide since its invention in the mid-20th century. This unassuming pattern of lines has become one of the most ubiquitous product innovations in modern commerce, scanning billions of items daily. But do you know what the first product ever scanned with a barcode at a retail checkout was? Test your knowledge about this groundbreaking retail innovation!

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A 10-pack of Wrigley's Juicy Fruit chewing gum
A carton of Marlboro cigarettes
A can of Campbell's tomato soup
A bottle of Coca-Cola