Sweet Acacia Inc. is considering modernizing its production facility by investing in new equipment and selling the old equipment. The following information has been collected on this investment: Old Equipment New Equipment Cost $80,640 Cost $38,400 Accumulated depreciation $40,500 Estimated useful life 8 years 8 years Remaining life $4,800 Salvage value in 8 years $10,560 Current salvage value $29,600 Annual cash operating costs Salvage value in 8 years $0 Annual cash operating costs $35,400 Depreciation is $10,080 per year for the old equipment. The straight-line depreciation method would be used for the new equipment over an eight-year period with salvage value of $4,800. Determine the cash payback period. (Ignore income taxes.) (Round answer to 3 decimal places, eg. 15.275.) Cash payback period years