A shopkeeper buys an item for Rs. 1000 and incurs additional expenses of Rs. 500 on transportation, Rs. 200 on labour, and Rs. 300 on packaging. He sells the item at a profit of 25%. The customer then spends Rs. 200 on the item and sells it at a profit of 30%. What is the approximate percentage difference between the shopkeeper's selling price and the customer's selling price?

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**Solution:**

1. Calculate the total cost price for the shopkeeper:
   - Cost price = Rs. 1000
   - Transportation = Rs. 500
   - Labour = Rs. 200
   - Packaging = Rs. 300

Total cost price = 1000 + 500 + 200 + 300 = Rs. 2000

2. Calculate the shopkeeper's selling price with 25% profit:
   $$	ext{Selling Price}_{shopkeeper} = 2000 + 25\% 	imes 2000 = 2000 + 500 = Rs. 2500$$

3. The customer spends Rs. 200 on the item, so the customer's cost price is:
   $$2500 + 200 = Rs. 2700$$

4. The customer sells it at 30% profit:
   $$	ext{Selling Price}_{customer} = 2700 + 30\% 	imes 2700 = 2700 + 810 = Rs. 3510$$

5. Find the percentage difference between the shopkeeper's selling price and the customer's selling price:
   $$	ext{Difference} = 3510 - 2500 = Rs. 1010$$

6. Calculate the percentage difference relative to the customer's selling price:
   $$\frac{1010}{3510} 	imes 100 \approx 28.78\% \approx 29\%$$

**Answer:** 29\%

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