function round (amount, numOfDecDigits) {
      numOfDecDigits = numOfDecDigits || 2;
      return Math.round(amount * Math.pow(10, numOfDecDigits)) / Math.pow(10, numOfDecDigits);
  }
Round an amount to the given number of Digits.
If no number of digits is given, than '2' is assumed.
@param amount Amount to round
@param numOfDecDigits Number of Digits to round to. Default value is '2'.
@return Rounded amount