Which ancient civilization developed the earliest known standardized retail pricing system with price tags, revolutionizing consumer transparency around 3000 BCE?

Before modern shopping malls and e-commerce platforms, ancient civilizations developed sophisticated commercial systems. Their marketplaces weren't just places for transactions but centers of cultural exchange and innovation. From specialized trade districts to early consumer protection measures, these ancient retail environments laid the groundwork for today's shopping experience. Test your knowledge about these remarkable early retail innovations that shaped commerce for millennia!

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Mesopotamian (Sumerian) merchants, who attached clay tablets with fixed prices to goods in marketplaces
Egyptian traders, who painted prices on papyrus slips attached to products in their bazaars
Indus Valley merchants, who used stamped shell discs to indicate standardized values for goods
Early Chinese markets, where merchants displayed bamboo price tags with standard values at Zhou Dynasty markets