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Let's work through the problems on your worksheet step by step.

### 1. Wall clock problem
**Given:**
- Net invoice price = ₱28,827.88
- Discount rate = 18%

We are asked to find:
- a) Net invoice price rate
- b) List price
- c) Discount

**Formulas:**
- List price (LP) = Net invoice price / (1 - Discount rate)
- Discount = List price × Discount rate

### 2. Dining table problem
**Given:**
- Net invoice price = ₱6,187.50
- This represents 75% of the original price.

We are asked to find:
- a) Original price
- b) Discount
- c) Discount rate

**Formulas:**
- Original price = Net invoice price / 0.75
- Discount = Original price - Net invoice price
- Discount rate = (Discount / Original price) × 100%

### 3. Washing machine problem
**Given:**
- List price = ₱20,040.00
- Discounts: 20%, 10%, and 5%

We are asked to find:
- a) Net invoice price
- b) Discount

**Formula:**
- Net invoice price = List price × (1 - First discount) × (1 - Second discount) × (1 - Third discount)
- Total discount = List price - Net invoice price

### 4. Complete the table:
Let's fill in the missing values using:
- Trade discount = Original price × Discount rate
- Net invoice price = Original price - Trade discount
- NIP rate = (Net invoice price / Original price) × 100%

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I will calculate the solutions for you now.Here are the solutions to the problems:

### 1. Wall clock problem:
- **List price**: ₱35,155.95
- **Discount**: ₱6,328.07

### 2. Dining table problem:
- **Original price**: ₱8,250.00
- **Discount**: ₱2,062.50
- **Discount rate**: 25%

### 3. Washing machine problem:
- **Net invoice price**: ₱13,707.36
- **Total discount**: ₱6,332.64

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Do you want more details or have any further questions?

### 5 Additional related questions:
1. How do you calculate the list price from the net invoice price and discount?
2. What is the significance of knowing the discount rate?
3. How does compounding multiple discounts affect the final price?
4. Why is it important to calculate the original price from the net invoice price?
5. Can you explain how the NIP rate is related to the original price and trade discount?

### Tip:
Always remember to convert percentage values to decimals when performing calculations, such as dividing by 100 when using a discount rate of 18%.

The net invoice price of a wall clock is ₱28,827.88. If the discount granted was 18%, find: a) net invoice price rate b) list price c) discount

Learn how to calculate the list price, discount, and net invoice price for a variety of products including a wall clock and a dining table using percentage discounts. This worksheet includes real-world examples and key discount formulas. Suitable for Grades 9-12.

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