This is a "simple interest" calculator $($no compounding$).$

The user enters two inputs: the starting balance and the time period, and the program uses a fixed

interest rate of $7\mathrm{.}5\%$ to determine both the total interest earned over that time period and the future

balance $($starting balance plus the total interest$).$

The mathematics in this program are simple. In the first example below: $10000*0\mathrm{.}075*5=3750.$

Note: there is no looping or error$-$checking in this program.

The sample output below shows the currency values displayed with two decimal places, which your

program should also do$.$

Sample Output from $3$ different runs:

It should be clear what parts of the samples are user input for all samples in this document.

E$.$g$.,$ in the first example below, the user entered $10000$ and $5.$ All the other parts of the sample were

printed by the program.

Simple Interest Calculator

Starting balance: $10000$

Time period: $5$

Based on $5$ time periods at $7\mathrm{.}5\%$ per period

Total interest $=$ $ $3750\mathrm{.}00$

Future balance $=$ $ $13750\mathrm{.}00$

Simple Interest Calculator

Starting balance: $53\mathrm{.}25$

Time period: $19$

Based on $19$ time periods at $7\mathrm{.}5\%$ per period

Total interest $=$ $ $75\mathrm{.}88$

Future balance $=$ $ $129\mathrm{.}13$

Simple Interest Calculator

Starting balance: $98765$

Time period: $3$

Based on $3$ time periods at $7\mathrm{.}5\%$ per period

Total interest $=$ $ $22222\mathrm{.}12$

Future balance $=$ $ $120987\mathrm{.}12$