try {
  String query = new String ("SELECT  " +
    "FirstName, LastName, Street, City, State, ZipCode, Sales " + 
    " FROM Customers " +
    " WHERE Sales IN (20000, 30000, 40000) " );
  DataRequest = Database.createStatement();
  Results = DataRequest.executeQuery (query);
  DisplayResults (Results);
  DataRequest.close();
}