Mikenbsp;Girvinteachesfinance, accounting, and statistics using Excelnbsp;at Highline Community College. He has more than 800 Excel how-to videos on YouTube and has been teaching people how to use Excel for the past 8 years. He lives in Seattle, Washington.Billnbsp;Jelenis an Excel expert at www.mrexcel.com, a regular on TechTV Canada'sCall for Help, and a video podcaster who is regularly listed in the iTunes top 50. He is the author ofExcel Gurus Gone Wild,Pivot Table Data Crunching, and 14 titles in the Excel for Professionals series. He lives in Akron, Ohio.