Hi,

I have a formula which works fine:

=SUMPRODUCT(
--(Projects_State=F15),
--(Projects_Dev_Type=F17),
--(Projects_Carrying_Value=F19),
--(Projects_Carrying_Value<=F21))
)

"Projects_State", "Projects_Dev_Type" and "Projects_Carrying_Value" are all
named ranges. They work fine.
F15 = a state in Australia
F17 = a text input from a drop down menu
F19/F21 = a numerical value.

The formula works fine. However, I want cells F15 and F17 to be "optional"
whereby if a user *does not* enter a value, it is treated as if all values
are required.

I have tried, and tried but cannot get anything to work...help please...