Which ancient civilization invented the first known retail receipt system using clay tablets to record transactions and inventory?

Throughout history, ancient civilizations developed sophisticated retail systems and innovations that shaped commerce for millennia to come. From the complex trade networks of Mesopotamia to the bustling markets of Rome, retail innovation has deep historical roots. This trivia question challenges your knowledge about a groundbreaking ancient retail innovation that transformed how merchants conducted business and tracked inventory.

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Sumerians (circa 3500 BCE) using cuneiform tablets to document barley and silver exchanges
Ancient Egyptians (circa 3000 BCE) using papyrus scrolls to record grain sales in marketplaces
Indus Valley merchants (circa 2600 BCE) using stamped clay tokens to track textile trades
Ancient Chinese (circa 2000 BCE) using oracle bones to document silk and jade transactions