Which ancient civilization invented the world's first known retail receipt system using clay tokens and sealed envelopes around 3500 BCE?

Before digital payments and shopping malls, ancient civilizations developed sophisticated commercial systems that laid the groundwork for modern retail. From Mesopotamian clay tokens to Roman shopping complexes, early merchants pioneered retail innovations we still use today. Test your knowledge of these ancient commercial breakthroughs that shaped how humans have bought and sold goods for millennia.

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• Mesopotamians (specifically in Uruk)
• Ancient Egyptians
• Indus Valley civilization
• Ancient Chinese

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