Exhibit 23(a) 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 Statements File Nos. 33-23021, 33-23022, 33-23023, and 33-47344 on Form S-8 and Nos. 33-49467, 33-49505, 33-49553, and 33-50069 on Form S-3. ARTHUR ANDERSEN & CO. Kansas City, Missouri, March 18, 1994