What is the best way to get a total/aggregate of the grid you are showing?

Hi! I have a report that aggregates a budget by client segment and returns the results in a grid. It works fine. However, I would like to add to my report the total for my grid at the top - not part of the grid- where I am going to add other text information. What is the best way to get a total/aggregate of the grid you are showing? Screenshot attached. Basically, a report total....

OriginalPostID-135924

OriginalPostID-135924

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