# Sum complete column of other sheet

Hello Everybody,

I have created a Spreadsheet which contains a bunch of sheets. All of them are in format like:

```
Sheet A:
date | amount
---------+--------
12/01/19 | 100
05/04/19 | 200
Sheet B:
date | amount
---------+--------
09/10/19 | 140
06/08/19 | 270
Sheet C, D, E, F … all in all about 20
```

And in `Sheet X`

I would like to summarize this like so:

```
Sheet | I | II | III | IV | Total
------------------------------------------
A | <Sum of all values from $A.B, where Month($A.A) in {1,2,3}> | … | … | …
B | <Sum of all values from $B.B, where Month($B.A) in {1,2,3}>
```

So basically I would like to see the Sum of the amount for each Sheet for each quarter of the year.

The Data in each Sheet may not be ordered…

How can I do this?

Thanks for Help!!!