Spreadsheets: how do I SUM values in a column, only if the text column has a 1?

Let's say I have this data

4     1
4     0
4     1
3     0
5     1

How do I write a function (using SUM or something like that) to add all the values on the left, if the values on the r开发者_JAVA百科ight are 1, or true

The total should be 13

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Assuming columns A and B are used...

Check just for 1:

=SUMIF(B1:B5,"=1",A1:A5)

If you want to check for TRUE also:

=SUMIF(B1:B5,"=1",A1:A5) + SUMIF(B1:B5,"=TRUE",A1:A5)

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sort by column b, then auto-sum the values you want in column a. cheap & lazy solution.