MDU Resources Group, Inc.     MDU            $22.09 down            $23.28                         $18.00

Texas Industries Inc.                   TXI               $40.45 up                 $42.74                         $21.89

U.S. Lime & Minerals, Inc.        USLM           $47.46 down             $67.40                         $37.19

Vulcan Materials Co.                  VMC             $40.72 up                   $48.09                          $25.06

Sources: New York Stock Exchange, Google Finance. Currency conversion calculated on July 3, 2012.

U.S. On-Highway Diesel Fuel Prices

                                                               7/2/2012               One Week              One Year

United States                                        3.648                       -0.030                  -0.202

East Coast                                            3.702                        -0.016                 -0.168