DCI Reports are best viewed in Excel. To do so, run the desired report, then click "Download to CSV" when the results appear. 

To total the results, follow the steps on these Microsoft Office tutorial videos:

https://support.office.com/en-us/article/Add-numbers-in-Excel-2013-fd4e875a-0709-425d-ba2c-72f0833318f7?ui=en-US&rs=en-US&ad=US