Question 1166134
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Suppose you invest $120 a month for 6 years into an account earning 8% compounded monthly. 
After 6 years, you leave the money, without making additional deposits, in the account for another 20 years. 
How much will you have in the end?
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For the first 6 years, it works as an ordinary annuity, and creates Future value of

    FV = {{{120*(((1+0.08/12)^(6*12)-1)/((0.08/12)))}}} = 11043.04  (rounded to the closest cent).



In the next 20 years, it works as an one-time deposit of 11043.04 compounded monthly at 8%.



Working this way, it produces the Future value / (final) amount of

    {{{11043.04*(1+0.08/12)^(20*12)}}} = 54406.88.


<U>ANSWER</U>.  The final value is $54406.88.
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Solved.