Which ancient civilization created the world's first known retail receipt system using clay tablets, essentially inventing retail record-keeping around 3000 BCE?

Before modern shopping malls and e-commerce giants, ancient civilizations had sophisticated retail systems that shaped economic history. From Mesopotamian marketplaces to Roman shopping complexes, retail innovation has deep historical roots. This trivia question explores how ancient civilizations revolutionized early commerce through remarkable retail developments that continue to influence business practices today.

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Sumerians in Mesopotamia
Ancient Egyptians along the Nile
Indus Valley civilization
Ancient Chinese during the Shang Dynasty