Chocolate is practically money

[essentialsaltes]

The Aztecs had bags of cacao beans that were used in trading, and also as a metaphorical reference for value. Due to their base-20 counting systems, they had bags with 400 beans (the Zontli) and bags with 8,000 beans (the Xiquipilli).

Comments

[stevenkaye.livejournal.com]

And now I am lost in http://en.wikipedia.org/wiki/Vigesimal