Video 00002 SUMPRODUCT_function Part1 posted in Formulas on January 22, 2013 by Kevin Lehrbass SHARE Tweet Many people have asked me about Excel’s sumproduct function. It is one of Excel’s most versatile and useful functions. Here is an introduction video. Watch my YouTube video Download my Excel file Download here or via my OneDrive (file 00002) Subscribe to my YouTube channel and learn more! See my free templates here!