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

Question

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 tha

Answer 1

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)