Answer:
Payback period = 3.5 years
Explanation:
The payback period is the estimated length of time it takes cash inflow from a project to recoup the cash outflow.
The payback period uses cash flows and not profit.
Payback period = Initial cost/annual net cash inflow
Payback period = 420,000/120,000= 3.5 years
Payback period = 3.5 years