A retailer bought a machine at a wholesale price of $80 and later on sold it after a 20% discount of the retail price. If the retailer made a profit equivalent to 20% of the wholesale price, what is the retail price of the machine? Choose the correct choice from the following choices.
A) $80  B) $100  C) $120  D) 135  E) 160
The price after the discount was 1.2*80= 
<gadget id="calculator">1.2*80</gadget>
<output>96</output>
$96   Let x be the retail price.   0.8x= $96   x = 96/0.8= 
<gadget id="calculator">96/0.8</gadget>
<output>120</output>
$120   The answer is $120.
<result>C</result>
A retailer bought a machine at a wholesale price of $80 and later on sold it after a 20% discount of the retail price. If the retailer made a profit equivalent to 20% of the wholesale price, what is the retail price of the machine?