please solve ising factor equations

2. A company is considering purchasing a robot for pulling parts from an injection molding machine with an initial cost of $55,000. The company expects production costs savings of $100,000 per year in each of the first three years, and $200,000 per year in the subsequent 2 years. What is the present value of all cash flows (initial cost of the robot and resulting production cost savings) if the company uses an interest rate of 6% per year on such investments