Insights totals for table calculation custom columns

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I’m getting the same as you, it would seem like table calculations do not support summation of totals in that way.

A tooltip explaining that table calculations on totals are run on the total row, rather than as an aggregation of the data rows, appears in a spreadsheet interface. (Captioned by AI)
A tooltip explaining that table calculations on totals are run on the total row, rather than as an aggregation of the data rows, appears in a spreadsheet interface. (Captioned by AI)216×110 5.6 KB

Insights is based on Google Looker.
I’ve found these articles:

Using table calculations | Looker | Google Cloud

Display potentially confusing table calculation totals as nulls | Looker | Google Cloud
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Why don’t my totals match the values in my table? | Looker | Google Cloud
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