ROK Corporation wants to invest in a new piece of machinery that will cost $100,000. Net annual cash flows from this new machine are projected to be: Year 1- $20,000 Year 2-$30,000 Year 3-$40,000 Year 4 $15,000 Year 5 $10,000 Year 6 $10,000 What is the payback period on this machine? Use the following format 1.67 years Round to the nearest two decimal place