Please assist with the IRR that was wrong and #3 which was wrong as well when I tried to calculate. Here is the question, thank you!

Wendell's Donut Shoppe is investigating the purchase of a new S34.600 donut-making machine. The new machine would permit the company to reduce the amount of part-time help needed, at a cost savings of $6.200 per year. In addition, the new machine would allow the company to produce one new style of donut, resulting in the sale of 2,200 dozen more donuts each year The company realizes a contribution margin of S2.00 per dozen donuts sold. The new machine would have a six-year useful life. Clidk here to view Exhibit 13B-1 and Exhibit 13B-2, to determine the appropriate discount factor(s) using tables. Required: 1. What would be the total annual cash inflows associated with the new machine for capital budgeting purposes? 6.200 Annual savings in part-time help 4.400 Added contribution margin from expanded sales Annual cash inflows S 10,800 2. Find the internal rate of return promised by the new machine to the nearest whole percent nternal Rate of Return Choose Denominator: Factor Number of years Internal rate of return Choose Numerator: Investment required v Annual cash inflow Factor 28X 3. In addition to the data given previously, assume that the machine will have a $12,630 salvage value at the end of six years. Under these conditions, compute the internal rate of return to the nearest whole percent. (Round your final answer to nearest whole percentage. 21X 96 internal rate of return