(Ignore income taxes in this problem.) Baldock Inc. is considering the acquisition of a new machine that costs $420,000 and has a useful life of 5 years with no salvage value. The incremental net operating income and incremental net cash flows that would be produced by the machine are: Assume cash flows occur uniformly throughout a year except for the initial investment. The payback period of this investment is closest to: 5.0 years 3.2 years 1.9 years 2.8 years