Excel - If cells in a column contain a certain value, how can I add the values of the adjacent cells?

Question

Consider this spreadsheet:

For all the cells in column A that contain the value "Y", how would I add the adjacent cells in column B together?

This is what I've tried so far to no avail, assuming COLUMN__A and COLUMN__B are defined names of cells in those columns:

=IF(ISNUMBER(SEARCH("Y",COLUMN__A)),SUM(COLUMN__B),0)

Answer 1

Try this one:

=SUMIF(A1:A100,"*Y*",B1:B100)

or

=SUMPRODUCT(ISNUMBER(SEARCH("Y",A1:A100))*(B1:B100))

both case insensitive.

Case sensitive formula is:

=SUMPRODUCT(ISNUMBER(FIND("Y",A1:A100))*(B1:B100))