Showing '0' for Null Value

Summary

How do you show a 0 value in place of a blank value on an analysis?

Content

Hello,

We want to show the total number of something on an analysis (in this case Leads). If there were no Leads created on a day, we want to show '0' but instead our analysis is showing a blank value. I checked the box to "Include Null Values" and tried a case statement. It still shows blank value. See attached screen shots. Also, we need the actual value of 0 rather than just a cosmetic formatting issue. We need to be able to show the average number of Leads at the end of the analysis.