In: Finance
FINANCE:
2.
Suppose you want to have $800,000 for retirement in 20 years.
Your account earns 7% interest.
a) How much would you need to deposit in the account each
month?
$
b) How much interest will you earn?
$
c) Suppose you waited 10 years to invest in the same retirement
fund and have the same $800,000 for retirement at the same 7%
interest. What amount will you have to deposit each month to match
the value of your annuity?
$
d) Which investment plan is better and why?
a) Monthly interest rate, r = 7%/12 = 0.005833333333
Number of monthly payments, n = 20 * 12 = 240
Monthly deposit required = $1,535.7248183392
b) The amount of interest = 800,000 - Monthly payment * Number of payments
The amount of interest = 800,000 - 1,535.7248183392 * 240
The amount of interest = $431,426.043598592
c) If we wait for 10 years, number of monthly payments, n = 10 * 12 = 120
r = 7%/12 = 0.005833333333
Monthly deposit required = $4,622.0116709978
d) Investing for 20 years is better because the monthly deposit is lower and we earn a larger portion of interest