Buy-Rite Pharmacy has purchased a small auto for delivering prescriptions. The auto was purchased for $34,000 and will have a 6-year useful life and a $4,600 salvage value. Delivering prescriptions (which the pharmacy has never done before) should Increase gross revenues by at least $32,600 per year. The cost of these prescriptions to the pharmacy will be about $26,200 per year. The pharmacy depreciates all assets using the straight-line method. The payback period for the auto is closest to (ignore Income taxes.): (Round your answer to 1 decimal place.)