Report and Dashboard

In my sheet, I have a column calculating the NETDAYS between two events. This column does not show up if I try to create a Summary Report. It only allows me to create a Row Report. In a dashboard, how can I use a half-pie graph to show the number NETDAYS greater than 37 and NETDAYS less than or equal to 37. I do have conditional formatting in my sheet to show this, but I would like a half-pie graph on a dashboard showing these numbers. Thank you in advance.

Answers