EXHIBIT 23 CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS As independent public accountants, we hereby consent to the incorporation of our reports included or incorporated by reference in this Form 10-K, into the Company's previously filed Registration Statements on Form S-8 (Registration Nos. 333-28661, 2-99389, 33-21699, 33-35288, and 33-45386) and Form S-3 (Registration No. 33-60485). Arthur Andersen LLP Minneapolis, Minnesota, December 21, 2000