A retailer purchase goods from a wholeseller for Rs. 1000. The retailer bears additional expense of Rs. 200 on carriage of goods by his servant and he sold the goods to the consumer for Rs. 1500. Find the pr cent gain.

Explanation

To solve the problem step by step, we need to determine the total cost incurred by the retailer and then calculate the profit and the percentage gain.

### Step 1: Calculate the Total Cost
The total cost incurred by the retailer includes the purchase price of the goods and the additional expenses.

- Purchase price from wholesaler = Rs. 1000
- Additional expenses (carriage) = Rs. 200

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