A shopkeeper bought sugar at a price of Rs. 40 per kg and is selling at a price of Rs. 50 per kg. When a customer bought 6 kg of sugar, using faulty weights he gave him only 5.4 kg of sugar. What is his total profit percentage?
1). 31.11%
2). 36.59%
3). 38.89%
4). 34.25%

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