How To Sum Conditionally?

[xlmaniac]

Dear ALl,
I do have a small sample data set across A1:B10 as follows.
I would like to conditionally sum as per the desired result across C2:C10.
Could somebody help me out with the formula which can yield the same?

[TABLE="width: 226"]
<colgroup><col span="2"><col></colgroup><tbody>[TR]
[TD]Region[/TD]
[TD]Identifier[/TD]
[TD]Desired Result[/TD]
[/TR]
[TR]
[TD]A[/TD]
[TD]1[/TD]
[TD]1[/TD]
[/TR]
[TR]
[TD]A[/TD]
[TD]1[/TD]
[TD]2[/TD]
[/TR]
[TR]
[TD]A[/TD]
[TD]1[/TD]
[TD]3[/TD]
[/TR]
[TR]
[TD]A[/TD]
[TD]1[/TD]
[TD]4[/TD]
[/TR]
[TR]
[TD]B[/TD]
[TD]1[/TD]
[TD]1[/TD]
[/TR]
[TR]
[TD]B[/TD]
[TD]1[/TD]
[TD]2[/TD]
[/TR]
[TR]
[TD]B[/TD]
[TD]1[/TD]
[TD]3[/TD]
[/TR]
[TR]
[TD]C[/TD]
[TD]1[/TD]
[TD]1[/TD]
[/TR]
[TR]
[TD]C[/TD]
[TD]1[/TD]
[TD]2[/TD]
[/TR]
</tbody>[/TABLE]
Thanks

 

[Joe4]

Just use SUMIF, and only have it go down as far as your current row.
So, if the first desired result is in cell C2, enter this formula in it and copy down for all rows:

=SUMIF(A$2:A2,A2,B$2:B2)

 

[xlmaniac]

Thank you so much for your support.
Really appreciate the same.