JOINT FILING AGREEMENT

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                                                                       Exhibit C

                             JOINT FILING AGREEMENT

        Pursuant to Rule 13d-1(k)(1) promulgated under the Securities Exchange
Act of 1934, as amended, the undersigned agree that the Statement on Schedule
13G to which this exhibit is attached is filed on behalf of each of them in the
capacities set forth below.

Dated:  April 6, 2001

                                    Xxxxx Family LLC

                                    By:  Xxxxxx X. Xxxxxx,
                                         as Manager

                                    By:                   *
                                           -------------------------------------

                                    Xxxxxx X. Xxxxxx, individually

                                    By:                   *
                                           -------------------------------------

                                    Xxxxxxxx X. Xxxxx,
                                    individually and as Trustee for Xxxxx
                                    Descendants Trust, Xxxxx Progeny Trust,
                                    Xxxxx Grandchildren Trust, Xxxxx Spouse
                                    Trust, DC Xxxxxxxx Trust, and as Director of
                                    Xxxxx Children's Foundation

                                    By:                   *
                                           -------------------------------------

                                    Xxxxxxxx Xxxxx Xxxxx
                                    individually and as Trustee for Xxxxx
                                    Descendants Trust, Xxxxx Progeny Trust,
                                    Xxxxx Grandchildren Trust, Xxxxx Spouse
                                    Trust, DC Xxxxxxxx Trust, and as Director of
                                    Xxxxx Children's Foundation

                                    By:                   *
                                           -------------------------------------

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                                    Xxxxxxx Xxxxx Xxxxxxx
                                    individually and as Trustee for Xxxxx
                                    Descendants Trust, Xxxxx Progeny Trust,
                                    Xxxxx Grandchildren Trust, Xxxxx Spouse
                                    Trust, DC Xxxxxxx Trust, and as Director of
                                    Xxxxx Children's Foundation

                                    By:                   *
                                           -------------------------------------

                                    Xxxx X. Xxxxx, individually and as Trustee
                                    for Xxxxx Descendants Trust, Xxxxx Progeny
                                    Trust, Xxxxx Grandchildren Trust, Xxxxx
                                    Spouse Trust, DC James Trust, and DC
                                    Xxxxxxxx Trust

                                    By:                   *
                                           -------------------------------------



* By:    /s/ Xxxxxxx X. Xxxxxx, Xx.
         --------------------------
             Xxxxxxx X. Xxxxxx, Xx.
             Attorney-in-Fact

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