Question 1183049
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A shopkeeper buys eggs in boxes of 60 for $1800. He sells them at $540 per dozen. 
(a) Did he make a profit or loss? 
(b) What was the profit or loss as a percentage of the {{{highlight(cross(cost))}}} <U>BUYING</U> {{{highlight(cross(price))}}} <U>COST</U>?
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<pre>
Profit = selling cost - buying cost.


Buying cost of 60 eggs is  $1800  (given).

Selling  cost of 60 eggs is, according to the problem,  {{{540*(60/12)}}} = 540*5 = $2700.


Profit = $2700 - $1800 = $900.    So, the seller makes a profit.


The profit as a percentage to the buying cost is  {{{(900/1800)*100}}} = 50%.
</pre>

Solved and explained.



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Please pay your attention on how I edited your post in order for it would make sense.


As you write the post, it becomes clear that you do not know the terminology in the subject area 

and do not understand on what you write.