Wendell$$s Donut Shoppe is investigating the purchase of an $$34,500$ donut$-$making machine with a six$-$year useful life. The new machine would reduce labor costs by $$5,600$ per year. In addition, it would allow the company to produce one new style of donut, resulting in the sale of $1,600$ dozen more donuts each year. The company realizes a contribution margin of $$2\mathrm{.}00$ per dozen donuts sold.

Click here to view Exhibit $14$B$-1$ and Exhibit $14$B$-2,$ to determine the appropriate discount factor$($s$)$ using tables.

Required:

What are the new machine$$s total annual cash inflows?

What discount factor should be used to compute the new machine$$s internal rate of return?

Note: Round your answer to $3$ decimal places.

What is the new machine$$s internal rate of return?

Note: Round your final answer to the nearest whole percentage.

In addition to the data given previously, assume the machine will have a $$15,645$ salvage value at the end of six years. Under these conditions, what is the internal rate of return? $($Hint: You may find it helpful to use the net present value approach; find the discount rate that will cause the net present value to be closest to zero.$)$

Note: Round your final answer to the nearest whole percentage. Please explain how to use the discount factor tables with the answer.