After decreasing 24% in the price of an article costs Rs.320. Find the actual cost of an article?  Choose the correct choice from the following options.
A) 400	B) 520	C) 651	D) 525	E) 421

Rationale: "cp * ( 76 / 100 ) = 320 cp = 4.21 * 100 = > cp = 421 answer : e"
Answer: E