Answer:
Internal Rate of Return (IRR) 9,00%
Explanation:
We use excel or a spreadsheet to calculate this ratio. See document attached.
We use a cash flow to solve this problem.
At moment 0 we have the investment cost , in this case $365,695. From period 1 to period 9, we have incomes o benefits of $61,000. Then, we calculate the Net cash flow that is the difference between benefits and cost.
We use all the result (positive and negative) in Net cash flow to get the IRR.