If an article is sold at 18% profit instead of 9% profit, then the profit would be $72 more. What is the cost price?	Choose the correct choice from the following choices:  A) $500  B) $600  C) $700  D) $800  E) $900
9% * cost price = $72   1% * cost price = $72 / 9= 
<gadget id="calculator">72 / 9</gadget>
<output>8</output>
$8   The cost price is $800.   The answer is $800.
<result>D</result>
If an article is sold at 18% profit instead of 9% profit, then the profit would be $72 more. What is the cost price?