If Column A is Blank, and the number listed in Column C is different than the
number listed in Column B, then I want to count the number of instances that
particular number occurs (in column B). Example:
Col A Col B Col C
X 1 3
3 3
2 2
X 1 1
3 3
I would want the formula to tell me I have two 3's in Col C.

I am currently using this beautiful formula to tell me the number of 1's,
2's, and 3's in Col B:
=SUMPRODUCT(--($B$2:$B$332=""),--($I$2:$I$332=ROWS($1:1)))
Don't know if it can be massaged to work as stated for Col C?

Also: Some of my cells in Col C hold more than one number (seperated by
comma's). Any way to get this same formula to search these cells as well?

Thank you!
--
Carol