Set Analysis using less than issue

[#1]

I need to count the number of items that have a duration of less than 259200.  I am trying this using set analysis but I am struggling.

Need to count the field "number", If "inc_business_duration" is equal to or less than 259200.

No matter what I try I cannot seem to get this one right.

[sunny_talwar]

May be this:

Count({<inc_business_duration = {'<=259200'}>}number)

[sunny_talwar]

Or this:

=Count(If(inc_business_duration <= 259200, number))

[maxgro]

count({$ <inc_business_duration={"<=259200"}>} number)