Totals and Subtotals

Method	Name	Behaviour
total or sum	Total	Returns the sum of all previous consecutive numbers
average or avg	Average	Returns the average of all previous consecutive numbers
previous or prev	Previous	Returns the number before the current line (defaults to 0)

Total

1                                | 1
2                                | 2
3                                | 3
total                            | 6

The total command calculates the sum of all previous consecutive numbers.

With consecutive numbers, we mean that the total command will only sum the non-empty lines that come before it, and it will stop at the first empty line or a line that does not contain a number.

1                                | 1
2                                | 2
3                                | 3
total                            | 6

4                                | 4
2                                | 2
total                            | 6

In the example above, the first total command sums the numbers 1, 2, and 3, while the second total command sums only the numbers 4 and 2, because it stops at the first empty line, making it to act like a subtotal.

Average

1                                | 1
2                                | 2
3                                | 3
average                          | 2

Previous

1                                | 1
2                                | 2
3                                | 3
previous                         | 3