When Peggy McCormick, right, reports for duty as a volunteer at Iola Senior Citizens, Inc.s thrift store at 223 N. State St., the 90-year-old is usually the oldest volunteer there. That is, unless fellow volunteer, Berdean Wall, 94, shows up for duty. Wall has been a volunteer with Iola Senior Citizens for 20 years or so; McCormick started as a volunteer about a year ago.