In Ancient Rome, what pricing strategy was commonly used in the macellum (food market) that resembles modern psychological pricing?

While modern retail has complex pricing algorithms and strategies, ancient civilizations developed sophisticated commercial systems thousands of years ago. From the agoras of Greece to the bazaars of Babylon, merchants employed various pricing techniques that laid the foundation for modern commerce. Test your knowledge about how ancient sellers determined the value of their goods and maximized their profits in pre-modern marketplaces.

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Duodecimal pricing - setting prices just under whole numbers of asses (bronze coins) to create the perception of better value
Imperial mandate pricing - all prices were fixed by government edict to prevent inflation during periods of grain shortage
Patron pricing - wealthy citizens would set marketplace prices each morning based on their willingness to pay
Solar pricing - prices would fluctuate throughout the day based on the position of the sun, being highest at noon