accounting

Division D is considering two possible expansion plans. Plan A would expand a current product line at a cost of $ 8,500,000. Expected annual net cash inflows are $ 1,550,000​, with zero residual value at the end of 10 years. Under Plan​ B, Division D would begin producing a new product at a cost of $ 8,300,000. This plan is expected to generate net cash inflows of $ 1,120,000 per year for 10 ​years, the estimated useful life of the product line. Estimated residual value for Plan B is $990,000. Division D uses​ straight-line depreciation and requires an annual return of 8​%. Compute the​ payback, the​ ARR, the​ NPV, and the profitability index for both plans. Begin by calculating the payback for both plans. ​(Round your answers to one decimal​ place, X.X.) Calculate the ARR​ (accounting rate of​ return) for both plans. ​(Round your answers to the nearest tenth​ percent, X.X%.) Average annual operating income/ Average amount invested= ARR I cant figure out the avg annual operating income