A dealer purchased toys at 1/2 of their list price and sold them for 10% more than the list price. What is his percent gain?	Choose the correct choice from the following
A) 10  B) 50  C) 110  D) 120  E) 220
Cost = 1/2= 
<gadget id="calculator">1/2</gadget>
<output>1/2 = around 0.5</output>
.5*L
Sale= 1.10 List Price = 1.10*L
Gain Ratio = (Sale - Cost) / Cost = (1.10*L - .5*L) / .5*L = .6*L / .5*L = 1.20
Gain Percent = 100 * Gain Ratio = 100 * 1.20= 
<gadget id="calculator">100 * 1.20</gadget>
<output>120</output>
120%= Answer 120
<result>D</result>
A dealer purchased toys at 1/2 of their list price and sold them for 10% more than the list price. What is his percent gain?