Not sure if I can be helped with this but Id appreciate any attempt. Even if just an image of what the final results should look like or an example.

Based on the artice "Supercharge Your Excel Sum Operations Add data by up to 30 Criteria, by J. D Kern in the July 2009 issue of the Journal of Accountancy Create a spreadsheet that contains the following data DATE CALLS MADE SALESPERSON Smith Barnes Martinez Jackson Hsu Smith Barnes Hsu Barnes 07/03/2014 07/05/2014 07/13/2014 07/20/2014 07/28/2014 08/01/2014 08/02/2014 08/10/2014 08/10/2014 08/14/2014 08/20/2014 08/22/2104 08/23/2014 09/01/2014 09/02/2014 09/05/2014 09/11/2014 09/11/2014 09/15/2014 09/20/2104 09/30/2014 09/30/2014 09/30/2014 100 110 95 115 120 125 115 110 100 135 115 90 85 100 90 95 140 150 110 120 120 90 60 Martinez Jackson Smith Barnes Martinez Jackson Hsu Jackson su Smith Barnes Martinez Jackson