Summary of all the column values

Hello!

I created this text column that shows the total sum of every row I have in the table:
Tables\Columns\TextColumn::make('sum_total_row')
      ->label('Activities Total')
      ->default( fn(Model $record) => $record->activities->sum('pivot.attributeX'))
      ->money('EUR')
      ->summarize(Summarizer::make()
          ->label('Total')
          ->using(fn () => 888)
      );


I also want to show the total sum of this specific column values. I managed to show a hardcoded number (888) above the column, but I can't show the dynamic sum.

I can't use the standard way to calculate the column sum, because this is not a DB column, it's dynamically created in my ManageRelatedRecords class.

Thanks!
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