...<=2/28/2005. Eventually I will need to do this for all the months in a huge spreadsheet. I tried changing the formula to
=SUMIF(B2:B9,">=1/1/2005*<=1/31/2005",C2:C9) but I get a 0
Then I changed the formula to
=SUMIF(B2:B9,">=datevalue(1/1/2005)*<=datevalue(1/31/2005)",C2:C9)
and again I...