Main currency works in metallic coins.
1. Iron:- works as base unit . 1coin= amount or anything that is worth 1 can be exchanged with it.
2. Copper:- 10Iron=1 copper. Pile of 10 iron could be exchanged for 1 copper.
3. Silver:- 100 copper =1 silver.
1 silver= 1000 Iron.
4. Silver coin half with gold in bottom:
500 silver=1 silver-gold.
1 silver-gold= 5000 copper.
1 silver-gold= 50000 Iron.
5. Gold:- 1000 silver=1 gold.
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Places of unit calling.
One-1
Deca-10
Cente-100
Milline-1000
Also check is used to transfer the amount of coins later on .