A 500g packet of tea is sold for 80 rupees and thoothbrush costing 11 is given free with it the shopkeeper Thus make a profit of 15 %on it what did the shopkeeper pay for it
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cp=100×sp÷100+p
100×[80-11]÷100+15
100×69÷100+15
6900÷115
60
100×[80-11]÷100+15
100×69÷100+15
6900÷115
60
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