Which ancient civilization invented the first known standardized retail pricing system with 'price tags' for goods in marketplaces?

Before modern shopping malls and e-commerce platforms, ancient civilizations developed sophisticated trading systems that laid the groundwork for today's retail industry. From the bustling marketplaces of Mesopotamia to the complex trade networks of Rome, these early retail innovations solved problems we still address today: product display, customer experience, payment systems, and supply chain management. Test your knowledge about these remarkable ancient retail innovations that continue to influence modern commerce practices.

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Ancient Rome with their fixed-price 'mercatus' system
Ancient Egypt where merchants used hieroglyphic price markers
Mesopotamian Babylonians with their cuneiform tablet price listings
Ancient Greece with their agora marketplace pricing stones