How to configure Dashboard slicers to work with Tabulate slicers?

I have a tabulate that contains 2 discovers, both filtered by a date.  I grab one of the rows from the second discover and place it at the bottom of the first sheet and create some calcs.

Here is a simplified example:

Rows 1-5 are from Discover 1

Row 6 is a simple Sum Total

Row 7 is coming from Discover 2 on sheet2

Row 8 is Row 6 divided by Row 7

 

This part is working as expected.  I can change the slicer and it returns the correct data.  The problem is when I drop it in a dashboard.  The slicer in the dashboard, which I pulled from the Tabulate, is not changing the data even though the breadcrumb is showing that the value is being passed in.  I’m sure it is something I missed in configuring either the slicer in Tabulate or the Visual Area.  Do I need to create parameters? Should I not include a slicer in the tabulate? How do I get the dashboard and tabulate to communicate?