rate,value1,value2,.!Returns the net present value of an investment based on a discount rate and a series of future payments ...

!rate,value1,value2,...!!Returns the net present value of an investment based on a discount rate and a series of future payments (negative values) and income (positive values)!is the rate of discount over the length of one period!are 1 to 254 payments and income, equally spaced in time and occurring at the end of each period!