I have a column of numbers I need to know how many unique values there are. Some of the numbers are just numbers, I.E. 200394840 while others start with a letter, I.E. I200394-840. I'm not sure if the hyphen in the middle of the number or the letter or both are throwing me off, but I've been using =SUM(IF(FREQUENCY(A2:A772,A2:A772)0,1)), but this seems to only count the numbered values, not the ones that start with letters or hyphens. Any/All help on this would be appreciated.