Video 00011 SUMPRODUCT_Part3 How it really works! posted in Formulas on April 5, 2013 by Kevin Lehrbass SHARE Tweet Learn what Excel’s sumproduct function is really doing. See what’s going on inside by evaluating it. Remember this: the F9 key is your friend! Download my Excel file Download the template here or via my OneDrive (file 00011) Watch my YouTube video Subscribe to my YouTube channel and learn more! See my free templates here!