code: public Number getUnits(int field) throws MPXJException
     {
        Number result;
  
        if ((field < m_fields.length) && (m_fields[field].length() != 0))
        {
           try
           {
              result = Double.valueOf(m_formats.getUnitsDecimalFormat().parse(m_fields[field]).doubleValue() * 100);
           }
  
           catch (ParseException ex)
           {
              throw new MPXJException("Failed to parse units", ex);
           }
        }
        else
        {
           result = null;
        }
  
        return (result);
     }
docs: Accessor method used to retrieve a Number instance representing the
  contents of an individual field. If the field does not exist in the
  record, null is returned.
  
  @param field the index number of the field to be retrieved
  @return the value of the required field
  @throws MPXJException normally thrown when parsing fails