Caliber Lawnmowers is considering the purchase of a new machine costing $ 818 comma 000. The company's management is estimating that the new machine will generate additional cash flows of $ 192 comma 000 a year for ten years and have a residual value of $ 56 comma 000 at the end of ten years. What is the machine's payback period? (Round your answer to two decimal places.) . 3.33 years B. 6.60 years C. 4.26 years D. 4.87 years