I have the formula: =SUMPRODUCT(--(Input!$E$4:$E$30="JK"),--(Input!L4:L30=01
March 2009 <=31 March 2009) but the last array in the formula (the one
searching for dates between 01 and 31 March 2009) does not work and returns
an error. I beleive that I have the syntax incorrect? Please help.