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3. A shop keeper sold a calculator for $243 ang the profit percent is 8%. what should be the selling price of the calculator if the shopkeeper wants to increase the profit the three times that of the oringinal profit? (Answers: $279)
4.The marked price of a radio was $128.A man bought it at20% discount of 5% on this price and still makes a profit of 25%.Find the cost price.(Answers: 25%)
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