Which ancient civilization first implemented a standardized retail price system with fixed prices posted at marketplaces, similar to modern point-of-sale displays?

The ancient world had sophisticated retail systems long before modern commerce. From Mesopotamian clay tokens for inventory tracking to Roman market segmentation strategies, these civilizations developed innovative approaches to commerce that laid the foundation for today's retail practices. This trivia challenges your knowledge of how ancient civilizations approached their retail strategies and market organization.

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Ancient Rome, with the Edict of Diocletian (301 CE) establishing maximum prices for over 1,000 goods and services
Ancient Egypt, where Pharaoh Amenhotep III created royal price controls on marketplace goods
Ancient Greece, where the Agora of Athens featured the world's first price-marked retail stalls
Babylonia, where Hammurabi's Code included fixed pricing regulations for merchants