Answer: 3.57 years
Explanation:
Payback period is the amount of time it would take for a project to pay back its initial investment.
Investment = $5,500
Year 1 + 2 + 3 = 1,300 + 1,500 + 1,900 = $4,700
With cash flow of $1,400 coming in fourth year and $800 remaining for payback, investment will be paid back in fourth year.
Payback period = Year before payback + Amount left/ Cashflow in year of payback
= 3 + (5,500 - 4,700) / 1,400
= 3.57 years