Grand Total inside Calculated Formula

Hello,
I am trying to achieve the following calculated parameter in an area schedule.
Calculated Factor = (Grand Total * Count Total)
Is it possible to do this via Dynamo or the standard Revit schedule functionality?
Please see screen capture example below.

@zakim ,

thats an example… we work with top numbers

KR

Andreas

Correct me if I am wrong, but the grand totals should already be the total of all areas times the count.

hello,
result like this ?