Matrix Table - Custom Row Total

Based on your description, I created data to reproduce your scenario. The pbix file is attached in the end.

Custom Row Total.pbix

databot_kd , There is no way to add a custom row total directly but what can be done is to make a new column that have the same value for 3 streams[Revenue, Other Incomes, Expenses] and some other value for the remaining 2 streams D&A. Add this new column to Top of rows for matrix visual, this would group the streams of choosing.