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To solve this problem, we need to calculate the total amount Tony has to repay on his loan with simple interest.

Here are the details:

- **Principal (P)**: $6,000
- **Interest Rate (r)**: 8% per year
- **Time (t)**: 9 months (which we should convert to years)

Using the simple interest formula:
\[
\text{Interest} = P \times r \times t
\]
where:
- $ P $ is the principal,
- $ r $ is the interest rate per year (as a decimal),
- $ t $ is the time in years.

### Step 1: Convert Time to Years
Since 9 months is $\frac{9}{12}$ of a year:
\[
t = \frac{9}{12} = 0.75 \text{ years}
\]

### Step 2: Calculate the Interest
Convert 8% to decimal form:
\[
r = \frac{8}{100} = 0.08
\]
Now, plug in the values:
\[
\text{Interest} = 6000 \times 0.08 \times 0.75
\]
\[
\text{Interest} = 6000 \times 0.06 = 360
\]

### Step 3: Calculate the Total Repayment
The total amount to repay includes the principal plus the interest:
\[
\text{Total Amount} = P + \text{Interest} = 6000 + 360 = 6360
\]

### Answer:
The total amount required to repay the loan is **$6360**.

Would you like more details on any step? 

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Here are some related questions to explore:

1. What would the total repayment be if the interest rate was 10% instead of 8%?
2. How would the answer change if the loan was repaid over 12 months?
3. What is the difference between simple interest and compound interest?
4. How do you calculate the interest if the interest is compounded monthly?
5. If Tony only repaid part of the loan in 9 months, how would we calculate the interest?

**Tip:** For financial calculations, always ensure the time period aligns with the interest rate (e.g., yearly rate with time in years).

Tony opened a hot dog stand last April. He borrowed $6000 to pay for the stand and startup inventory and agreed to pay off the loan in 9 months at 8% simple interest. Find the total amount required to repay the loan.

Learn how to calculate the total amount needed to repay a $6000 loan taken at 8% simple interest over 9 months. This example covers simple interest concepts and calculations, ideal for high school math students.

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