Before the emergence of coinage in about 700 BCE, it was by standard weights weight of precious metals.
The mesopotamins farming system, is like the egyptions. the mesopotamins used irrigation.
They developed a writing system.
metric
They developed a writing system.
60
The Mesopotamians
cuneiform but farther back, pictographs
There is no nation-state there, so there are no mints to produce any kind of monetary system.
Uncontrolled water supply
Mesopotamians like the Sumerians.
They look like butt buddies
South Korea's monetary system is comprised on the Korean won. A single won is divided into 100 jeon, the monetary sub-unit of South Korea.