Proposals O and K each cost $500,000, have 6-year lives, and have expected total cash flows of $720,000. Proposal O is expected to provide equal annual net cash flows of $120,000, while the net cash flows for Proposal K are as follows:
Year 1 $250,000
Year 2 200,000
Year 3 100,000
Year 4 90,000
Year 5 60,000
Year 6 20,000
$720,000
Determine the cash payback period for each proposal.