Preston, Inc. is evaluating two possible investments in depreciable plant assets. The company uses the straight-line method of depreciation. The following information is available: Initial capital investment Estimated useful life Estimated residual value $ Investment A Investment A Investment B Investment B 215,000 7 years 15,000 50,000 15% 280,000 $ 6 years 5,000 85,000 11% Estimated annual net cash inflow for 10 years Required rate of return. Compute the payback period for each investment. Show your calculations and round to one decimal place. Select the formula, then enter the amounts to calculate the payback period for each investment.. = Payback (in years)