A lot of questions allready posted on this mater, but i can't seem to find
the right one.

I like to sum a range b2:b32 if the range a2:a32 is a workday.
A2:32 is a date which is a day of the month 1 to 31.

aka
day value
2010-1-1 1
2010-1-2 3
2010-1-3 6
2010-1-4 15
2010-1-5 2
etc.
What will be the formula to "sum column value only for workdays"?

Is this possible without creating a C-column with if-statement
(if(workday(a2;3)<5;b2;0))?