Currency

10 Copper (cp) are 1 Silver (sp). 10 sp are 1 Gold (gp). 10 gp are 1 Platinum (pp).

Coins are used for everyday transactions. While every nation in Carmia mints their own currency, weight and denominations are roughly the same, making the exchange an easy process. At least most of the time. For large transactions, letters of credit are sometimes used.

Meta Note
The prices of goods and services in Carmia differ greatly from the real world, since other things are important and certain resources are more or less available. But in the DMs head canon, having 1 gp there is similar to having 100$ in the US now.