A firm is considering investing $8.5 million in equipment which is expected to have a useful life of four years and is expected to reduce the firms labor costs by $3.5 million per year. Assume the firm pays a 30% tax rate on accounting profits and uses the straight line depreciation method. What is the after-tax cash flow from the investment in years 1 through 4? If the firms hurdle rate for this investment is 15% per year, is it worthwhile? What's the NPV?