Answer:
The turbines will have to work for 7.11 years to recoup the investment
Step-by-step explanation:
The payback period is the estimated length of time in years it takes
the net cash inflow from a project to equate and recoup the net cash the initial cost
Where a project is expected to generate a series of equal annual net cash inflow, the payback period can be calculated as:
Payback period =The initial invest /Net cash inflow per year
The cost of the investment = 8 × 80,000. = 640,000
Annual savings in cost = $0.10 × 900,000 = $90,000 per annum
Payback period = 640,000/90,000
= 7.11 years
The turbines will have to work for 7.11 years to recoup the investment