xelatex - Changing currency in Latex that's not Dollar, Pound or Euro -

how change currency in latex template? that's text based, south african rand (symbol > 'r'). latex doesn't recognize zar etc.

fyi: i'm using invoice template.

within invoices, or template containing currency you'll want change, write next:

\documentclass[letterpaper]{dapper-invoice}  \renewcommand{\$}{\text{r}} 

in above instance, i'm changing $ zar (south african rand). it's simple way of changing currency text-like currency (eg. 'r').