Can I use sumif with OR to sum based on two column criteria?

[DLB]

I am try to use sumif on two different criteria, but the first criteria could
be "A" or "B".

Somthing like this:
=SUMPRODUCT(--(A3:A6="A" OR "B"),--(B3:B6="C"),C3:C6)

Not even sure if Sumproduct is the right path to follow.

Any thoughts?

 

[DLB]

Thanks David! It works as advertised!

=SUMPRODUCT((A3:A6="A")+(A3:A6="B"),--(B3:B6="C"),C3:C6)