Exhibit 23 CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS As independent public accountants, we hereby consent to the incorporation of our report included in this Form 10-K, into the Company's previously filed Registration Statement File Nos. 33-60549, 33-68646, 33-68648, 33-86616, 33-93006, 33-96950, 333-40973, 333-40981, 333-75803 and 333-84705. ARTHUR ANDERSEN LLP Minneapolis, Minnesota, April 28, 2000