Ayayai Growth Farms, a farming cooperative, is considering purchasing a tractor for $576,700. The machine has a 10-year life and an estimated salvage value of $59,000. Delivery costs and set-up charges will be $14,400 and $400, respectively. Ayayai Growth uses straight-line depreciation and has a required rate of return of 9%. Ayayai Growth estimates that the tractor will be used five times a week with the average charge to the individual farmers of $400. Fuel is $50 for each use of the tractor. The present value of an annuity of 1 for 10 years at 9% is 6.41766. Click here to view PV tables. For the new tractor, compute the: (a) Cash payback period. (Round answer to 1 decimal places, eg. 15.2) Cash payback periodi years