Which retail technology advancement, introduced around 600 BCE, revolutionized ancient commerce by standardizing product value and eliminating the need for barter?

Before modern shopping malls and e-commerce, ancient civilizations developed sophisticated retail systems and product branding that laid the foundation for today's commercial world. From the bustling markets of Mesopotamia to the trade networks of Rome, retail innovation has deep historical roots. Test your knowledge about one of history's most significant retail technology advancements that revolutionized commerce in the ancient world.

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Coinage (standardized metal currency)
Clay tablet receipts (cuneiform transaction records)
Stamped amphora (branded product containers)
Abacus (transaction calculation device)