This was a time long before coins. It would be thousands of years before the Lydians in modern day Turkey would invent gold coins as a form of money.

Back in the Akkadian Empire, gold and silver were still used as a medium of exchange.

But the prices of goods and services were based on the weight of metal, and typically denominated in a unit called a 'shekel', about 8.33 grams.

For example, you could have bought 100 quarts of grain in ancient Mesopotamia for about 2 shekels of silver, a weight close to half an ounce in our modern units.

Both gold and silver were used in trade. And at the time the 'exchange rate' between the two metals was fixed at 8:1.

Throughout ancient times, the gold/silver ratio kept pretty close to that figure.

During the time of Hamurabbi in ancient Babylon, the ratio was roughly 6:1.

In ancient Egypt, it varied wildly, from 13:1 all the way to 2:1.