Horizontal Slicer options coming from different columns.

Hi, I would like to have a Horizontal Slicer with a single select option. Which should look like this:

The problem is that I don’t know who I can create above slicer if the data comes from one dimension but different columns and are last level (like booking lines) or consolidated members (like Projects Result IRFS).  

This is the “fact table”:

This is the “CalcPos” dimension:

As example:

If I chose “Booking Lines” the result should be 1467.

If I choose “Project Result IFRS” the result should be 1912.

If I choose “Projects Result IFRS Incl. Comm. Adj.” the result should be 2844.

Can someone help me please?

I much appreciate you efforts and thank you in advanced.

Brgds

Kai