A retailer buys a radio for Rs 225. His overhead expenses are Rs 20. He sellis the radio for Rs 300. The profit percent of the retailer is  Choose the correct choice.
A) 22.4 %
B) 50 %
C) 25 %
D) 52 %
E) none of these

Rationale: "explanation : cost price = ( 225 + 20 ) = 245 sell price = 300 gain = ( 55 / 245 ) * 100 = 22.4 % . answer : a"
Answer: A