I have a set of values in Column A that are the Master List (A1:A301)

and a second set of values in Column C of which some are new. (C1:C98)

My goal is to discover which values are in Column C but not in Column A. Most of the C values are also in A, but a few are not and these are the ones I need.

I've tried =ISNA(MATCH but something is not quite right. I feel like this should be simple but I'm having difficulty.

Thank you