Adding a Total Column to a Matrix Visual that only sums spcific columns

you made a table visual. I need a matrix visual that has Action in columns and Custid and Date (in real solution, there are more criteria like country, gender etc) in rows. rows are drillable.

So, if I have a matrix that filters on rows AND columns, I guess it is not possible to have extra colums for measures that only filter on row criteria, but is independant from column criteria. Or is there a solution?

My solution now is:

I added an extra column in Query Editor that is always 1. Then pivoted the column Action (using the always 1 column as value) and use the new columns (one for each distinct value in Action) in data section. Leave column section empty. Then I can add measures to the data section and they get also new columns.