=SUMPRODUCT(--($D$5:$D$31<""),--($I$5:$I$31<""),--((D$5:D$31-I$5:I$31)<60))

--
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HTH

Bob

(there's no email, no snail mail, but somewhere should be gmail in my addy)



"Angyl" wrote in message
...
How do I get this formula:
=SUMPRODUCT(--(D$5:D$31-I$5:I$31<60))

To ignore empty cells? It's currently tallying all the empty ones
contained
in the ranges.