I'm a rusty Excel user, and designed a sheet to report on monthly values
"items closed" using Sumproduct as indicated below.

Here are my fields on the report tab:
Column B: Date checked (data entry cell)

Column C: Number Submitted
=SUMPRODUCT(--(MONTH('Data Entry'!$B$2:$B$2000)=1),--(YEAR('Data
Entry'!$B$2:$B$2000)=2009))

Column D: Number Completed
=SUMPRODUCT(--('Data Entry'!$F$2:$F$2000="Closed"),--('Data
Entry'!$B$2:$B$2000=DATE(2009,1,1)),--('Data
Entry'!$B$2:$B$2000<=DATE(2009,1,31)))

I have now found that they want it reported "as of the date checked" which
is sometime between the 25th and last date of the month, depending. I have a
data entry field for the date checked, but I must have to change the way I'm
pulling the date. It doesn't like just a plain old cell reference. Help?