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Cullumber Inc. wants to purchase a new machine for $44,300, excluding $1,500 of installation costs. The old machine was purchased 5 years ago and had an expected economic life of 10 years with no salvage value. The old machine has a book value of $2,200, and Cullumber Inc. expects to sell it for that amount. The new machine will decrease operating costs by $10,000 each year of its economic life. The straight-line depreciation method will be used for the new machine for a 6-year period with no salvage value. Click here to view the factor table. (a) Determine the cash payback period. (Round cash payback period to 2 decimal places, e.g. 10.53.) Cash payback period years. (b) Determine the approximate internal rate of return. (Round answer to 0 decimal places, e.g. 13%. For calculation purposes, use 5 decimal places as displayed in the factor table provided.). Internal rate of return. %