Question 1192291
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I don't know where your teacher is getting the "profit would be 50% of their cost"


The profit itself is 
profit = revenue - cost = 153 - 90 = 63
which leads to 
profit/cost = 63/90 = 0.70 = 70%


So the "50%" should be "70%".


If the shop owner wants to break even, then they would sell the item at the price they purchased it. 
Meaning the sale price would be $90. 
The breakeven point is when the profit is 0.
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