The formula you use to find the PV of the stream of payments of $1,800,000, $3,000,000 and $400,000 is this:
PV=P{[1 + R]^N - 1.[1 + R]^-N} R^-1=PV OF $1 PER PERIOD
And also you have to use the following PV formula:
PV=FV[1 + R]^-N=PV OF $1 IN THE FUTURE
Where R=Interest rate per period, N=number of periods, P=periodic payment. PV=Present value, FV=Future value.
