Which ancient civilization invented the first known mechanical device for tracking inventory and sales transactions in retail settings?

Long before digital cash registers and inventory management software, ancient civilizations developed sophisticated systems for commerce and trade. From the agoras of Greece to the forums of Rome and the bazaars of Mesopotamia, early retailers created innovative solutions to track goods, manage customer experiences, and optimize their sales strategies. Test your knowledge about these fascinating early retail technologies that laid the foundation for modern commerce!

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Mesopotamians with their clay token system (c. 8000 BCE)
Egyptians with their hieroglyphic receipt scrolls (c. 3000 BCE)
Romans with their abacus-based merchandise calculators (c. 500 BCE)
Chinese with their counting rod transaction system (c. 200 BCE)