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The question asks how much Loek would pay for a coffee machine ("koffiezetapparaat") and a kettle ("waterkoker") in a normal week, considering that during the promotion week:

- Loek did not pay the 21% VAT (Value Added Tax) and received a €25 cashback on the coffee machine.
- He paid €109 for the coffee machine and €36 for the kettle during this promotion.

To find the total price in a normal week (without the promotional benefits), we need to:

1. Add the €25 cashback to the price of the coffee machine.
2. Add 21% VAT to both the coffee machine and the kettle.

### Step-by-step calculation:

- Coffee machine:
  - Actual price without cashback: \( 109 + 25 = 134 \)
  - Including 21% VAT: \( 134 \times 1.21 = 162.14 \)

- Kettle:
  - Including 21% VAT: \( 36 \times 1.21 = 43.56 \)

### Total cost in a normal week:
- \( 162.14 + 43.56 = 205.70 \)

Thus, in a normal week, Loek would pay **€205.70** for both the coffee machine and the kettle.

Would you like further details or explanations? Here are some related questions:

1. How does VAT impact the final price?
2. What is the importance of cashback in reducing costs?
3. How to calculate percentage increases, such as VAT?
4. How do discounts during promotional weeks affect consumer decisions?
5. Can the same method be applied to calculate discounts for other products?

**Tip**: When calculating price increases due to taxes like VAT, always multiply the base price by \( 1 + \text{tax rate} \) to find the final price.

Hoeveel kosten het koffiezetapparaat en de waterkoker samen in een normale week?

This problem explains how to calculate the total cost of a coffee machine and kettle, considering 21% VAT and €25 cashback. It involves understanding percentage calculations, VAT, and cashback adjustments. Suitable for students in Grades 6-8.

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