You've got a number in the cell, so that's why it doesn't satisfy the
formula you were given. As ever, the secret in getting a working answer is
to ask the right question. Your subject line talked about "If two Columns
have Data", and the text of your question talked about "I10 = Blank" as the
condition for getting a blank answer, so those are the questions which I and
others answered, but you *do* have data, you *don't* have a blank, you have
a zero, and that is why the answer to the question you asked doesn't give
the result you wanted for the question you *didn't* ask. [This, of course,
is one danger in suppressing display of zero values. You need to remember
that they are still there, even if you decide you don't want to see them.]