BSU Inc. wants to purchase a new machine for $44,300, 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 $2,200, and BSU Inc. expects to sell it for that amount. The new machine would decrease operating costs by $10,000 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.

1. Determine the cash payback period. I got 4.36 correct
2. Help with this...Determine the approximate internal rate of return. I answered 11% I got this wrong
3. Assuming the company has a required rate of return of 9%, determine whether the new machine should be purchased. I said Should be accepted got that write