Okay, here are the steps to solve this problem:
1) Savings start in year 3 at $10,000.
2) Savings increase by $1,000 each year for 5 years, so years 4-8 savings are $11,000, $12,000, $13,000, $14,000, $15,000.
3) There are 8 years of savings total.
4) Interest rate is 15%.
To calculate the present value at year 0 (today), we use the following formula:
PV = FV / (1 + r)^n
Where FV is the future value, r is the interest rate, and n is the number of years.
So for year 3 savings of $10,000:
PV = $10,000 / (1 + 0.15)^3 = $8,562
For year 4 savings of $11,000:
PV = $11,000 / (1 + 0.15)^4 = $8,948
And so on...
Adding up the present values for years 3 to 8:
$8,562 + $8,948 + $9,371 + $9,820 + $10,298 + $10,796 + $11,310 + $11,842 = $80,847
Therefore, the total present value of the 8 years of savings is $80,847.
So the software is worth $80,847 today at a 15% interest rate.
Let me know if you have any other questions!