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I'd like to use array function to get conditional sum based on two columns. Given the example, for each ID I want to calculate the sum of value column if column B is -1

ID | B | value |
A1   1     2
A2   1     3
A3   1     4
A3  -1     5
A3  -1     1
A2   1     5
A1   1     1
A2  -1     2

The outcome should be

ID | value_total |
A1  1      0
A2  1      2
A3  1      6
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marked as duplicate by Excellll, Raystafarian, CharlieRB, nixda, Carl B Nov 5 '13 at 14:05

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You want to sum col C for each unique value in col A when col B is -1? And you want a formula, not a macro? – Raystafarian Jul 31 '13 at 13:32
You probably want a sumifs – Raystafarian Jul 31 '13 at 13:39
@Raystafarian, that's it. Publish it as an answer and I'll accept it. – Karusmeister Jul 31 '13 at 14:09
@Excellll What is the point in having "Microsoft-excel" and "Microsoft-excel-2010" both as tag? You can have all Excel questions in your favorite list with *excel* as tag. Note the placeholders – nixda Nov 4 '13 at 20:28
@nixda See meta in a few places: – Excellll Nov 4 '13 at 21:53

1 Answer 1

up vote 2 down vote accepted

You'll want to use =sumifs() in excel versions later that 2007. Here is documentation


SUMIFS(sum_range, criteria_range1, criteria1, [criteria_range2, criteria2], …)

=sumifs(C2:C9, A2:A9, "A#", B2:B9, "-1")

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