Inactive Relationshhip Just Slicer

Hi,

Could somebody please help me in the simple example that ive attached?

I need to make my relationship with stock and sales to the country active, but I have multiple measures in my actual sheet. I know that you can use userelationship on a measure by measure basis, but does this mean it has to be used on every measure on the page to work with the slicer?

Dummy Data.pbix

In the attached I need the country table to work and slice both tables, even though they already both use the item table in a bi directional way.

Thanks

Liam