Your formula should work if "array entered" (and corrected with added "H"), i.e. use

=SUM(IF((K18:K20="Y")+(K18:K20=""),H18:H20,0))

select formula by pressing F2 key then hold down CTRL and SHIFT keys while pressing ENTER. If done correctly curly braces like { and } will appear around the formula

...or you can use a "non-array" version with SUMPRODUCT like this

=SUMPRODUCT((K18:K20="Y")+(K18:K20=""),H18:H20)

or SUMIF like this

=SUM(SUMIF(K18:K20,{"Y",""},H18:H20))

regards, barry

=SUM(IF((K18:K20="Y")+(K18

select formula by pressing F2 key then hold down CTRL and SHIFT keys while pressing ENTER. If done correctly curly braces like { and } will appear around the formula

...or you can use a "non-array" version with SUMPRODUCT like this

=SUMPRODUCT((K18:K20="Y")+

or SUMIF like this

=SUM(SUMIF(K18:K20,{"Y",""

regards, barry