Right now if you have a column you can see the sum, average, median, min, max, range, and few other summaries of every record in that column.
One thing I think would be very useful for formula columns is to apply that formula to all columns.
So if the formula for column 3 is Column 1 / Column 2… then the summary applies the same formula to the sum of column 1 and the sum of column 2.
The closest thing that I can come up with is “average” but that isn’t accurate.