I depends on what you mean by "correspond to". Regardless, an "or" condition
involves simple addition. Try:

To count the occurrences:
=countif(a:a,"A")+countif(a:a,"C")

To sum column B if:
=sumif(a:a,"A",b:b)+sumif(a:a,"C",b:b)

Regards,
Fred.

"Janie" wrote in message
...
I know COUNTIF isn't the right function because I know it cannot use logic
operators. Here's what I am trying to accomplish:

Col A Col B
A 5
B 6
C 3
A 3
A
B 7

The question is, how many numbers in Column B correspond to EITHER A or C?

Recommendations?