Hi experts

I have spread sheet which has three columns, A,B,C. In each column there is an email for an user.

I want to exclude users who are EITHER/OR in column A or Column B AND in column C.

After that I need a count for the users who are left in column C.

Tried different codes and scripts but cant get it to work properly.

So if an email is present in column C and is also in A or B or both, I want them removed.

Thanks in advance.

Best regards

Daniel