Question 1022648:  A woman bought 130 kg of eggs for 52 dollars. She sold half of them at a profit of 30%. The rest of the eggs began to go bad,  she then reduced the selling price per kg by 12%. Calculate  
1. The new selling price per kg. 
 
2. The percentage profit on the whole transaction if she threw away 5 kg of bad eggs.  
 Answer by Theo(13342)      (Show Source): 
You can  put this solution on YOUR website! she bought 130 kilograms for 52 dollars. 
that's a cost per kilogram of 52/130 = .4 dollars per kilogram.
 
 
at 30% profit, the selling price per kilogram would be .4 * 1.3 = .52 per kilogram.
 
 
if she reduced the selling price by 12%, then the new selling price would be .52 - .12 * .52 = .4576 per kilogram.
 
 
since she threw away 5 kilograms from the second batch, then she only sold 60 kilograms from the second batch.
 
 
she sold 65 kilograms from the first batch at .52 dollars per kilogram for a total revenue of 33.8 dollars.
 
 
she sold 60 kilograms from the second batch at .4576 dollars per kilogram for a total revenue of 27.456 dollars.
 
 
her total revenue was 33.8 + 27.456 = 61.256 dollars.
 
 
her total cost was 52 dollars.
 
 
her total profit was equal to 61.256 - 52 = 9.256 dollars.
 
 
her profit margin was 9.256 / 52 = .178 * 100 = 17.8%.
 
 
 
 
 
 
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