Final answer:
To produce the desired cash flow of $11,600 per year, your grandfather needs to invest approximately $96,666.67.
Step-by-step explanation:
To calculate how much your grandfather needs to invest to produce the desired cash flow, we can use the formula for the present value of an annuity. The formula is:
PV = CF / r
Where:
- PV is the present value
- CF is the cash flow (which is $11,600 per year)
- r is the interest rate (which is 12.0% or 0.12)
Using this formula, we can plug in the values to find the present value:
PV = $11,600 / 0.12 = $96,666.67
Therefore, your grandfather needs to invest approximately $96,666.67 to produce the desired cash flow.