Find the data Power bi is working with

Hey all,

I am just starting to work with Power Bi just a couple of week ago. So I am trying to learn the basics. 

Now I have made a measure to look up certain data from my datasheet, but the outcome doesn't match the what is should be.

So I try to find out where the mistake is made. Easiest way for me is to see which values Power BI is using to get the total value

Is there a way I can zoom in the exact rows Power Bi is working with to get the  value in the vizualization?

 Thanks for the help