Combining parameter inputs in different Looker Studio pages

[dompow]

Apologies if something like this has been asked beforehand.

I have created a Looker Studio section entitled "Australia & New Zealand") with two separate pages in it (i.e. 'Australia' and 'New Zealand'). I want to be able to combine the respective sales forecasts of both countries  within the 'Australia' page only.

To do that, I've created an 'Australia Sales Target' parameter in one Looker Studio page and a 'New Zealand Sales Target' parameter  in the other/second page (entitled "New Zealand").

The problem is that I can't seem to add together the inputs for the two respective parameters (in their respective pages). The formula is straight forward (UA + NZ) but I only get the 'Australia Sales Target' if I display the result in a scorecard chart in the Australia page. Likewise, I only get the 'New Zealand Sales Target' if I display the result in a scorecard chart in the New Zealand page. I get that the parameters are page-specific only ...... How do I get Looker Studio to combine them?

[sam8]

You're spot on that each parameter is page-specific. There's no way to pass a parameter value from one page to another. 

So, you'll need to get creative to show UA+NZ on these pages. Can you create a scorecard that doesn't listen to any parameter, but instead listens to its own filter, which filters on both countries?