Which ancient civilization invented the first standardized retail pricing system using labeled clay tags attached to merchandise?

Before modern shopping malls and e-commerce, ancient civilizations pioneered sophisticated retail systems and product innovations. From the bustling agoras of Greece to the complex trade networks of Mesopotamia, our commercial ancestors were remarkably innovative. This poll explores a fascinating retail innovation from antiquity that revolutionized commerce and laid groundwork for future trade developments. Test your knowledge about these early retail pioneers!

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Ancient Egypt, using hieroglyphic price markers attached to goods in the royal marketplaces around 2500 BCE
Mesopotamian Sumerians, developing clay price tags with cuneiform inscriptions for standardized marketplace transactions circa 3000 BCE
Phoenician merchants, who created wax tablet pricing systems for their Mediterranean trading posts around 1500 BCE
Han Dynasty China, which implemented bamboo slip pricing tags in imperial markets around 200 BCE