Exhibit E

AGREEMENT TO FILE SCHEDULE 13D JOINTLY

(as required by Item 7 of Schedule 13D)

The undersigned persons hereby agree that reports on Schedule 13D, and any amendments thereto, may be filed in a single statement on behalf of all such persons, and further, each such person designates Marc D. Hamburg as its agent and attorney-in-fact for the purpose of executing any and all such reports required to be made by it with the Securities and Exchange Commission.

Dated: February 4, 2005

BERKSHIRE HATHAWAY INC.		OBH, INC.
By:	/S/ MARC D. HAMBURG	By:	/S/ MARC D. HAMBURG
	Name:     Marc D. Hamburg		Name:     Marc D. Hamburg
	Title:       Vice President		Title:       Vice President
NATIONAL INDEMNITY COMPANY		NATIONAL FIRE AND MARINE INSURANCE COMPANY
By:	/S/ MARK MILLARD	By:	/S/ MARK MILLARD
	Name:     Mark Millard		Name:     Mark Millard
	Title:       Assistant Secretary		Title:       Assistant Secretary
CYPRESS INSURANCE COMPANY		COLUMBIA INSURANCE COMPANY
By:	/S/ RODNEY ELDRED	By:	/S/ MARK MILLARD
	Name:     Rodney Eldred		Name:     Mark Millard
	Title:       Vice President		Title:       Assistant Secretary
BH COLUMBIA INC.		NATIONAL LIABILITY & FIRE INSURANCE COMPANY
By:	/S/ MARC D. HAMBURG	By:	/S/ MARK MILLARD
	Name:     Marc D. Hamburg		Name:     Mark Millard
	Title:       President		Title:       Assistant Secretary
BLUE CHIP STAMPS		WESCO FINANCIAL CORPORATION
By:	/S/ JEFFREY L. JACOBSON	By:	/S/ JEFFREY L. JACOBSON
	Name:     Jeffrey L. Jacobson		Name:     Jeffrey L. Jacobson
	Title:       Vice President		Title:       Vice President
WESCO HOLDINGS MIDWEST, INC.		WESCO-FINANCIAL INSURANCE COMPANY
By:	/S/ MARC D. HAMBURG	By:	/S/ MARK MILLARD
	Name:     Marc D. Hamburg		Name:     Mark Millard
	Title:       Treasurer		Title:       Assistant Secretary

WARREN E. BUFFETT		GOVERNMENT EMPLOYEES INSURANCE COMPANY
	/S/ WARREN E. BUFFETT	By:	/S/ CHARLES R. DAVIES
			Name:     Charles R. Davies
			Title:       Senior Vice President
GEICO CORPORATION
By:	/S/ CHARLES R. DAVIES
	Name:     Charles R. Davies
	Title:       Senior Vice President