Hire charges for the kit and use of the speedboat are worked out on the following basis:
Kit hire, per person for 1 session:
Speedboat + driver, per half-hour:
40 Qiy *
95 QiY

Mel and her husband each want to go water-skiing at some point during every day of their week, and have been given 2,000 Sjy (* the local currency) as a wedding present to enable them to enjoy this.
Will 2,000 be enough?
They have also been advised to allow about 5% above advertised rates for trips and entertainments, to give as a tip afterwards.
Can they also manage this?

To answer this question, we need to break down the costs and compare them to Mel and her husband's available budget of 2,000 Sjy, keeping in mind the additional 5% they are advised to set aside for tips.

### Step 1: Define the costs.
- **Kit hire per person for one session**: 40 Qiy (assuming "Qiy" and "Sjy" are interchangeable, so we treat both as the same currency).
- **Speedboat + driver for a half-hour**: 95 Qiy.

### Step 2: Determine the daily cost for both Mel and her husband.
- **Kit hire for both per session**: \( 2 \times 40 = 80 \) Qiy.
- **Speedboat + driver for half an hour**: 95 Qiy.

Total cost per day = 80 Qiy (kit hire for two) + 95 Qiy (speedboat) = **175 Qiy**.

### Step 3: Calculate the weekly cost for 7 days.
- Weekly cost = \( 175 \times 7 \) = **1,225 Qiy**.

### Step 4: Consider the 5% tip.
- 5% of 1,225 Qiy = \( 0.05 \times 1,225 \) = **61.25 Qiy**.
- Total cost including tips = 1,225 Qiy + 61.25 Qiy = **1,286.25 Qiy**.

### Step 5: Compare the total cost with the available budget.
- Total available: **2,000 Sjy**.
- Total cost (with tips): **1,286.25 Sjy**.

### Conclusion:
Mel and her husband will have **1,286.25 Sjy** in total costs including tips, which leaves them with **713.75 Sjy** remaining. 

So yes, the 2,000 Sjy will be enough to cover the costs of water-skiing every day for a week, along with the 5% tip.

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Would you like a more detailed breakdown, or do you have any further questions? Here are five related questions you might find useful:

1. How would the cost change if they skied twice a day?
2. What would happen if the cost of the speedboat was raised?
3. How much could they spend on other activities with the remaining 713.75 Sjy?
4. If the tip percentage increased to 10%, would 2,000 still be enough?
5. What if they decided to ski for more than a week?

**Tip:** Always account for unforeseen expenses by budgeting a little more than you initially expect.

Explore how to calculate daily costs for water-skiing using a budget of 2,000 Sjy, including tips. Understand the breakdown of costs for kit hire and speedboat use per session, and assess if the budget is sufficient. Ideal for travelers planning activities on a budget.

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