FOR M.E. WEDS 9-10-97 Today we begin a three part series on bank fees. Consumer groups have blasted banks for excessive fees in an era of record profits. One of the most lucrative service charges is the bounced check fee. In the first report of our series, Minnesota Public Radio's Bill Catlin reports that banks have figured out the bounced check fee can turn rubber into gold. Tune in at 5:30 tonight for more about bounced check fees, including a banking practice that can make customers bounce more checks