If a bookstore sells a new book at a 10% discount on its price, it can still make a profit of 20% A. 26 yuan B. 27 yuan C. 28 yuan D. 29 yuan

9 x = 21 (1 + 20%), the solution is: x = 28, so choose C

RELATED INFORMATIONS

1. If a store sells a commodity at a 10% discount on the price (i.e. 10% discount), it can still make a profit of 20%. If the price of the commodity is 28 yuan per unit, the purchase price of the commodity is () A. 21 yuan B. 19.8 yuan C. 22.4 yuan D. 25.2 yuan
2. The price of a commodity is 132 yuan. If it is sold at a 10% discount on the price, it can still make a profit of 10%, then the purchase price of the commodity is () A. 105 yuan B. 100 yuan C. 108 yuan D. 118 yuan
3. If a commodity with a price of 800 yuan is sold at a 10% discount and still makes a profit of 20%, the purchase price of the commodity is（ a576 b600 c640 d720
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5. If the price of a commodity is 800 yuan and it is sold at 10% discount, it can still make a profit of 20%, then the purchase price of this commodity is______ Yuan
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7. If the profit margin is 10%, the purchase price is 1600 yuan
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