After decreasing 20% in the price of an article costs Rs.620. Find the actual cost of an article?	Pick:
A) 775	B) 620	C) 750	D) 800	E) 720

Rationale: "cp * ( 80 / 100 ) = 620 cp = 7.75 * 100 = > cp = 775 answer : a"
Answer: A