I'm not sure if I'm interpreting your question correctly, but maybe you can go to the analytics pane and select totals, row grand totals:
Have attached the workbook.
example (1)_v10.5.twbx 67.2 KB
Thanks Mavis for the reply. I am just gonna play around a bit.
But basically, I want this result:
Which was done by using Sets and Combined Sets, however, I want parameters to be in placed so users that use the dashboard can decide what two or three suitcases they want combine or RIGHT/LEFT join them.