Garrison Rentals can purchase a van that costs $54,000, it has an expected useful life of three years and no salvage value Garrison uses straight-line depreciation. Expected revenue is $36,000 per year. Assume that depreciation is the only expense associated with this investment Required a. Determine the payback period. (Round your answer to 1 decimal place.) b. Determine the unadjusted rate of return based on the average cost of the investment (Round your answer to i decimal place. 234 should be entered as 23.4)) a Payback period b Unadjusted rate of return years CPrey 6of 13 Next ???@e w? o searchh