c. The internal rate of return is between what two whole discount rates (e.g., between 10% and 11%, between 11% and 12%, between 12% and 13%, between 13% and 14%, etc.)? Data Example E \begin{tabular}{lr} \hline Cost of equipment needed & $430,000 \\ \hline Working capital needed & $55,000 \\ \hline Overhaul of equipment in four years & $45,000 \\ \hline Salvage value of the equipment in five years & $40,000 \\ \hline Annual revenues and costs: & \\ \hline Sales revenues & $430,000 \\ \hline Cost of goods sold & $220,000 \\ \hline Out-of-pocket operating costs & $90,000 \\ \hline Discount rate & 11% \\ \hline \end{tabular} Enter a formula into each of the cells marked with a ? below Exhibit 7-8 *Use the formulas from Appendix 7B: Present value of $1=1/(1+r)n Present value of an annuity of $1=(1/r)(1(1/(1+r)n)) where n is the number of years and r is the discount rate