Ravi purchased 20 dozens of toys at the rate of Rs. 360 per dozen. He sold each one of them at the rate of Rs. 33. What was his percentage profit?	Choose the correct answer.
A) 23%  B) 12%  C) 10%  D) 34.1%  E) 12.2%
C   C.P. of 1 toy = 360/12 = Rs. 30   S.P of 1 toy = Rs. 33   Profit = 3/31.25 * 100 = 10%
<result>C</result>
Ravi purchased 20 dozens of toys at the rate of Rs. 360 per dozen. He sold each one of them at the rate of Rs. 33. What was his percentage profit?