Displays a value as a currency amount, with
a currency symbol and thousands separator if specified in the data
type’s format.

The currency value can be in the range
[-99,999,999,999,999.99999 to 99,999,999,999,999.99999]. The
decimal point is implied in the number, but not actually stored.
For display purposes, currency values are limited to 14 digits to
the left of the decimal and 5 digits to the right.

When specifying the keyable length for a currency
value, note that all five decimal places must be accounted for. For
instance, a currency value that will have the form $XXX.XX (two
decimal places) will actually need to have a keyable length of 8 to
account for the three additional decimal places that aren’t
shown.