Crazy Eddie has a key chain factory. Eddie managed to decrease the cost of manufacturing his key chains, and thus to increase the profit from the sale of each key chain from 25% of the selling price to 30% of the selling price. The selling price did not change. If the manufacturing price is now $140, what was it before the decrease?
A. $120
B. $150
C. $160
D. $180
E. $185
The OA is B
Source: Economist GMAT
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