15.3.3.3 Currency Symbols
  To print a currency symbol before the first digit of a num-
  ber, you must start the field with two dollar signs. If the
  data contains both positive and negative numbers, you must
  include a trailing minus sign.
  DECLARE STRING CONSTANT FM = "$$##.##-"
  PRINT USING FM, 77.44
  PRINT USING FM, 304.55
  PRINT USING FM, 2211.42
  PRINT USING FM, -125.6
  PRINT USING FM, 127.82
  END

  Output
    $77.44
  $304.55
  % 2211.42
  $125.60-
  $127.82
  Note that the dollar signs reserve places for the currency
  symbol and only one digit; the dollar sign is always printed.
  (Hence the warning indicator ( % ) when the third PRINT
  USING statement executes.) Contrast this with the asterisk-
  fill field, where BASIC prints asterisks only when there are
  leading spaces.

  By default, the currency symbol is a dollar sign. On
  OpenVMS systems, you can change the currency symbol,
  radix point, and digit separator by assigning the char-
  acters you want to the logical names SYS$CURRENCY,
  SYS$RADIX_POINT, and SYS$DIGIT_SEP, respectively.

  If you try to print a negative number in a dollar sign field
  that does not include either a trailing minus sign or the
  CR and DR formatting character, BASIC signals ``PRINT
  USING Format error'' (ERR=116).