LMN Company purchased a machine for $240,000. The machine has an expected five-year life and a salvage value at the end of the five years equal to $25,000. The machine is expected to generate net cash inflows each year as follows: Year 1 ....... $ 84,000 Year 2 ....... $102,000 Year 3 ....... $108,000 Year 4 ....... $ 72,000 Year 5 ....... $ 54,000 The payback period on this machine would be