Byy-Gite Pharmacy has purchased a small auta for delivering prescriptions. The auto was purchased for $21000 and will have a 6 -year useful iffe and a $5, 000 salvage value. Delivering presariptions (which the pharmacy has never done beforel) should increase gross revenues by at least \$33,000 per year. The cost of these prescriptions to the pharmacy will be about 527000 per year. The pharmacy depreciates all assets using the straight-line method. The payback period for the auto is closest to (lgnore income taxes): (Round your answer to 1 decimal place) Wutple Choice 3.5 years 4.3 years 4.5 years 27 years