What played the role of money in ancient Mexico? Why was the money on the Anaguac plateau and in the forests of Yucatan different?

On the Anaguac Plateau, cocoa beans were used as money, which do not grow there. In the forests of Yucatan, where cocoa grows and is not uncommon, other exotic objects, such as gems (jade, turquoise) and sea shells, served as money.

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