Exhibit 23 CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS As independent public accountants, we hereby consent to the incorporation of our report dated January 25, 1994 included in this Form 10-K, into the Company's previously filed Registration Statements, File Numbers 2-96973, 33-22358, and 33-33087. /s/ Arthur Andersen & Co. ARTHUR ANDERSEN & CO. Seattle, Washington, February 2, 1994.