In: Finance
1. Value of $4000 annual savings at the end of year 20 = Amount * ( (1 + Interest)^n - 1) / r
Value of $4000 annual savings at the end of year 20 = 4000 * ( (1 + 0.06)^20 - 1) / 0.06
Value of $4000 annual savings at the end of year 20 = 4000 * 2.20713 / 0.06
Value of $4000 annual savings at the end of year 20 = $147142.36
2. Value of $147142.36 at the end of 40 years = Amount * (1 + Interest)^Years
Value of $147142.36 at the end of 40 years = 147142.36 * 1.06^20
Value of $147142.36 at the end of 40 years = 147142.36 * 3.2073
Value of $147142.36 at the end of 40 years = $471905.50
3.Value of $5000 annual savings at the end of year 20 = Amount * ( (1 + Interest)^n - 1) / r
Value of $5000 annual savings at the end of year 20 = 5000 * ( (1 + 0.06)^20 - 1) / 0.06
Value of $5000 annual savings at the end of year 20 = 5000 * 2.20713 / 0.06
Value of $5000 annual savings at the end of year 20 = $183927.96
4. Total value at the end of year 40 = $471905.50 + 183927.96
Total value at the end of year 40 = $655833.45