I have this org-mode table in a file named `1.org`:
| . | A | B | C |
|---+----+-----+------|
| X | 10 | 100 | 1000 |
| Y | 20 | 200 | 2000 |
| Z | 30 | 300 | 3000 |
|---+----+-----+------|
| T | | | |
#+TBLFM: @5$2..$4=vsum(@I..@II)
If I move the cursor to the `#+TBLFM` line and run `C-c C-c`, I get the totals of each column in the last row labelled `T` like so
| . | A | B | C |
|---+----+-----+------|
| X | 10 | 100 | 1000 |
| Y | 20 | 200 | 2000 |
| Z | 30 | 300 | 3000 |
|---+----+-----+------|
| T | 60 | 600 | 6000 |
#+TBLFM: @5$2..$4=vsum(@I..@II)
All good so far. But if instead I place the cursor on the row labelled `Y` (for example, just place the cursor on `Y`) and then run `C-u C-c C-c` I get this
| . | A | B | C |
|---+-----+------+-------|
| X | 10 | 100 | 1000 |
| Y | 60 | 600 | 6000 |
| Z | 100 | 1000 | 10000 |
|---+-----+------+-------|
| T | 170 | 1700 | 17000 |
#+TBLFM: @5$2..$4=vsum(@I..@II)
Why did it place the sum of each column in the row labelled `Y` even though the the `#+TBLFM` clearly says to put the sum in last row (row `@5`)?
---
Documentation of `C-u C-c C-c` - https://orgmode.org/manual/Updating-the-table.html
> `C-u C-c *` or `C-u C-c C-c`
>
> Recompute the entire table, line by line. Any lines before the first hline are left alone, assuming that these are part of the table header.