Which ancient civilization first implemented a sophisticated 'psychological pricing' strategy where prices ended in odd numbers (similar to today's $9.99 pricing) to make products seem less expensive?

Step back thousands of years into the bustling marketplaces of ancient civilizations! While we often think of modern retail strategies as new innovations, many of these practices have surprisingly ancient roots. This trivia question explores how ancient civilizations approached consumer psychology and pricing strategies in their commercial centers. Test your knowledge about how our ancestors influenced the commercial world we know today!

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Ancient Rome, where merchants in the Forum set prices at 99 denarii instead of 100 to create an illusion of affordability
Ancient Babylon, where marketplace sellers used 9-ending prices on clay tablets to make goods appear less expensive to customers
Ancient Egypt, where Nile merchants priced luxury goods at 49 debens rather than 50 to appeal to noble customers
Ancient Greece, where agora vendors implemented fractional drachma prices to create a perception of value for citizens