#### Explanation:

$\textcolor{p u r p \le}{\text{Assumption: The 8% is the annual rate.}}$

There are 4 of these calculations per years so instead of using 8% at each calculation we use (8%)/4 per calculation 4 times a years. Which is $= \frac{8}{400}$

Let $n$ be the number of years
Let the count of calculations be $c = 4 n$

Let the principle sum be $P$
Let the Total in the account at count c be ${T}_{c}$

Then we have:

${T}_{c} = P {\left(1 + \frac{8}{400}\right)}^{4 n}$
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You ask: $\textcolor{p u r p \le}{\text{what is the value of$600 per quarter for 4 years}}$This implies an output of a list comprising of the progressive value of the$600 plus interest at each quarterly stage over the 4 years.

$\textcolor{p u r p \le}{\text{Another assumption}}$
Calculating for the total of compounded interest plus the principle sum $\underline{\text{after completion of 4 years.}}$

T_c=$600(1+8/400)^(16) =$823.6714....

T_(c=16)=\$823.67 to 2 decimal places

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