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To calculate the final amount that Mark and his friends paid, we need to add the service charge and GST to the total.

### Given:
- **Menu prices total**: $245
- **Service charge**: 10%
- **GST**: 9%

### Step 1: Calculate the service charge.
\[
\text{Service charge} = 10\% \text{ of } 245 = 0.10 \times 245 = 24.50
\]

### Step 2: Add the service charge to the menu price.
\[
245 + 24.50 = 269.50
\]

### Step 3: Calculate the GST.
GST is applied on the total after the service charge:
\[
\text{GST} = 9\% \text{ of } 269.50 = 0.09 \times 269.50 = 24.26
\]

### Step 4: Add the GST to the total.
\[
269.50 + 24.26 = 293.76
\]

### Final Amount:
The final amount they paid is **$293.76**.

Would you like a detailed breakdown or have any questions? Here are some related questions for practice:

1. What would be the total amount if the service charge was only 5%?
2. How would the final amount change if there was no GST applied?
3. What would the total be if the meal cost was $300 instead of $245?
4. How do service charges and GST affect the overall pricing in a restaurant bill?
5. What is the total percentage increase from the base menu price due to service charge and GST?

**Tip**: Service charges and taxes like GST are usually calculated sequentially, with the service charge being added first before applying taxes.

Mark and his friends had dinner at a restaurant. The menu prices totaled $245++. Calculate the final amount they paid, including a service charge of 10% and a GST of 9%.

Learn how to calculate the final amount after a 10% service charge and 9% GST for a $245 meal. Step-by-step solution shows percentage calculations and how to apply them.

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