You can do this by creating three calculated fields and placing them in the Measure Values card. I have reattached your workbook here.
Hope this helps!
Thank you Tracy. That works. But I think I made my example a little too simple. What I have is several metrics along different dimensions. I have made a Parameter to select which metrics I want to see. Basically I want to look at difference of that metric along 2 different dimensions. I will send a complete work book soon.
In anycase, your answer definetely helped.
Your reply helped me to resolve my issue I'm working from last 3 days.
Thanks a lot.