Which ancient civilization invented the world's first standardized retail pricing system, replacing individual bartering with fixed prices for goods in marketplaces?

Before modern retail, ancient civilizations developed sophisticated commercial systems that revolutionized how goods were traded and sold. These early retail innovations shaped commerce for millennia to come. Test your knowledge about these remarkable ancient retail strategies that laid the foundation for today's global marketplace. Some of these practices were so effective they continue to influence modern retail concepts!

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Mesopotamian Empire (circa 3000 BCE)
Roman Empire (circa 100 CE)
Han Dynasty China (circa 200 BCE)
Mayan Civilization (circa 600 CE)