Counting numbers in one column by criteria in another

[burnsbyrne]

I have the following data:
Unit Criteria
4b 4
6b 1
4b 1
6b 2
4a 1
4b 1
6b 3
6b 1
4a 1
6b 5
I need to know how many times 4b (and 4a and 6b) has each of five criteria (1,2,3,4 or 5). I was looking at SUMPRODUCT that I have used to count criteria that are text, but it doesn't work for numeric criteria.
Can anyone help?
Thanks.
Mike

[JBeaucaire]

Maybe this:
=SUMPRODUCT(--($A1:$A20="4a"),--($B$1:$B$20<=5))

[Palmetto]

See attached.

[burnsbyrne]

Thanks very much Palmetto! I didn't think of setting up a results table with criteria, or whatever that is officially called.

[Palmetto]

You're welcome.

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