What formula should I use to sum this field
I'm trying to get a calculation field to add the "purchase total" field from a portal line if the "purchase type" field =Project Expense".
This is what I typed
If ( Project Purchases::Purch_type="Proj. Exp." =sum (Project Purchases::Purchase Total))
It comes back and says "there are not enough peramiters "
Any help is appreciated.