Manager of a computer company plans to spend on new hardware $3.5 million in the first year with amounts decreasing by $0.2 million each year thereafter. Income of the company is expected to be $8.0 million the first year increasing by $0.3 million each year thereafter. Determine the annual worth over the years 1 through 5 of the companies net cash flow at annual interest rate of 10%.

Does it want the sum year 1 +year 2 .....+year x? the answer only seems to want a single number.