If an article is sold at 18% profit instead of 9% profit, then the profit would be $54 more. What is the cost price?  Choose the correct choice from the following answers.
A) $500 B) $600 C) $700 D) $800 E) $900
9% * cost price = $54   1% * cost price = $54 / 9= 
<gadget id="calculator">54 / 9</gadget>
<output>6</output>
$6   The cost price is $600.   The answer is $600.
<result>B</result>
If an article is sold at 18% profit instead of 9% profit, then the profit would be $54 more. What is the cost price?