BSU Inc. wants to purchase a new machine for $44,055, excluding $1,500 of installation costs. The old machine was bought five years ago and had an expected economic life of 10 years without salvage value. This old machine now has a book value of $2,400, and BSU Inc. expects to sell it for that amount. The new machine would decrease operating costs by $10,500 each year of its economic life. The straight-line depreciation method would be used for the new machine, for a six-year period with no salvage value.

a. Determine the cash payback period. (Round cash payback period to 2 decimal places, e.g. 10.53.)

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.)