Sheridan Unlimited is considering purchasing an additional delivery truck that will have a seven-year useful life. The new truck will cost $39,100. Cost savings with this truck are expected to be $11,900 for the first two years, $8,300 for the following two years, and $4,700 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, eg. 52.75.) Payback period years What is the discounted payback period for this project with a discount rate of 10 percent? (Round answer to 2 decimal places, es. 52.75.) Discounted payback period years