Which ancient civilization first implemented the retail concept of 'fixed pricing' that eliminated the need for haggling in everyday marketplace transactions?

The ancient world wasn't just about conquests and monuments—it was home to sophisticated commercial systems that laid the foundation for modern retail. From the bustling agoras of Greece to the complex trade networks of Mesopotamia, ancient civilizations pioneered retail strategies we still use today. This poll tests your knowledge about an innovative ancient retail practice that revolutionized commerce and continues to influence modern business strategies.

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Ancient Rome with their standardized 'Denarius Price Edicts' under Emperor Diocletian
Ancient Egypt where pharaohs established fixed grain prices to stabilize the economy during flood seasons
Phoenician merchants who introduced price tags on textile goods to speed up transactions in distant ports
Harappan civilization of the Indus Valley who used standardized weights for fixed-price transactions