A retailer bought a hat at wholesale and marked it up 70% to its initial price of $34. By how many more dollars does he need to increase the price to achieve a 100% markup?  Pick one
A) 2 B) 4 C) 6 D) 8 E) 10
Let x be the wholesale price.   Then 1.7x= 34 and x = 34/1.7= 
<gadget id="calculator">34/1.7</gadget>
<output>20</output>
20.   To achieve a 100% markup, the price needs to be $40.   The retailer needs to increase the price by $6 more.   The answer is 6.
<result>C</result>
A retailer bought a hat at wholesale and marked it up 70% to its initial price of $34. By how many more dollars does he need to increase the price to achieve a 100% markup?