Which ancient civilization first implemented a 'fixed price' retail system where haggling was eliminated for many goods?

The ancient world had sophisticated commerce systems long before modern economics. From Mesopotamian clay tablet receipts to Roman market regulations, ancient civilizations developed complex pricing strategies that influenced trade throughout their empires. Some of these approaches to valuing goods and services continue to influence economic thinking today. Test your knowledge of how ancient merchants determined the worth of their products and maximized their profits in early marketplaces.

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Roman Empire
Ancient Egypt
Mesopotamia
Ancient Greece