As an alternative, if you could use

=SUMPRODUCT(--(WEEKNUM(Sheet1!$A$2:$A$100)=WEEKNUM(A2)),Sheet1!$ D$2:$D$100)


--

HTH

RP
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"Dominique Feteau" wrote in message
...
I have a sheet that has nothing but data. Columns a Date, Employee,
Form,
Number

On another sheet, i want to add the total of "numbers" per "form" per week
from the "date"

now the date on the first sheet is daily. on the second sheet its "week
ending".

how do i set up the formula to add up only those for a certain week?