Concord Unlimited is considering purchasing an additional delivery truck that will have a seven-year useful life. The new truck will cost $36,000. Cost savings with this truck are expected to be $11,000 for the first two years, 57,600 for the following twoyears, and $4,100 for the last three years of the truck's useful life. What is the payback period for this project? (Round answer to 2 decimal places, e.5. 52.75.) What is the discounted payback period for this project with a discount rate of 9 percent? (Round intermediate calculations to 5 decimal places, e.8. 0.42355, Round answer to 2 decimal piaces, e.g. 52.75.1