Computes the net present value for a series of periodic cash flows with the discount rate Rate. Values should be positive if they are received as income, and negative if the amounts are expenditure.
Berekend de netto wearde fan hjoed foar searjes fan periodike jildberin mei it koartingsrintetaryf. Wearden moatte posityf wêze as se as ynkommen binnenkomme, en negatyf as útgeand boekt is.