NPV is the net present value of all cash inflows & outflows at required rate of return.

Required rate of return = cost of capital + required margin

If NPV is positive at required rate of return then proposal should be accepted but if NPV is negative at required rate of return then proposal should be rejected. Let’s Find out NPV in calculator given below-

(usable for proposal period upton 30 years)

**Note: Use negative figures for outflow and positive figures for inflow.**