Answer:
4 years
Step-by-step explanation:
Payback period is the time in which a project returns back the initial investment in the form of net cash flow.
Initial Investment = $280,000
Net Income = $20,000
To calculate the net cash flows add bask the depreciation expense in Net income each year.
Depreciation = ($280,000 - $30,000) / 5 = $50,000
Net Cash Flow = $20,000 + $50,000 = $70,000
Payback period = Initial Investment / yearly cash flow = $280,000 / $70,000 = 4 years