is this a usable instance?
output format The format will be fed three positional parameters, namely, value, code, and symbol, in this order.
fraction symbol, e.g, "¢"
number of fractionary parts in a unit, e.g, 100
currency name, e.g, "Renminbi"
ISO 4217 numeric code, e.g, "840"
rounding convention
symbol, e.g, "¥"
currency used for triangulated exchange when required
ISO 4217 three-letter code, e.g, "CNY"