Sum of row n through last row

Question

I want to create a TOTAL row at the top of my spreadsheet. In this row, each cell should be the SUM of the values in the column below the TOTAL row.

So for example, i

Answer 1

Try this

=SUM(OFFSET(A1,1,0,ROWS(A:A)-1,1))

Works in both Excel and Google Docs

One downside: by using OFFSET the formula becomes Volatile ie is calculated every time the sheet calculates irrespective of data change.