My Corporation has been presented with an investment opportunity which will yield end-of-year cash flows of $30,000 per year in Years 1 through 4, $35,000 per year in Years 5 through 9, and $40,000 in Year 10

NPV is calculated by finding the present value of each cash flow, including both cash inflows and outflows, discounted at the firm's cost of capital.

NPV = sum of CFt where CF is the cash flow
(1 + k)t k is the cost of capital
t is the period

NPV = - 150,000 + 30,000 + 30,000 + 30,000 + 30,000 + 35,000 + 35,000 + 35,000 + 35,000
(1.10)1 (1.10)2 (1.10)3 (1.10)4 (1.10)5 (1.10)6 (1.10)7 (1.10)8

+ 35,000 + 40,000
(1.10)9 (1.10)10

NPV = - 150,000 + 27,273 + 24,792 + 22,539 + 20,490 + 21,731.5 + 19,757.5 + 17,962 + 16,327.5 + 14,843.5 + 15,420

NPV = - 150,000 + 201136

NPV = 51,136

You should accept this investment because the net present value from this investment is positive.