title: How can I add an Average column to this text table?
body: <p>I'm building my first dashboard in Tableau and I'm just beginning to learn all the nuances. Right now, I have a basic text table as shown in the image below. I'm trying to add an "Average" column at then end which will give the average per "Assignee" across the 5 fiscal week's shown. I assume there must be a pretty simple way to do this, but I've searched all over and cannot figure it out. I've been able to change the "Grand Total" column to show averages, but not add an additional column so I can display both data points. Can anyone provide some insight into how to make this work?</p>
  
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