A watch was sold at a loss of 20%. If it was sold for Rs.520more, there would have been a gain of 6%. What is the cost price?	Answers:
A) rs . 1500  B) rs . 2000  C) rs . 3000  D) rs . 4200  E) rs . 2500

Rationale: "80 % 106 % - - - - - - - - 26 % - - - - 520 100 % - - - - ? = > rs . 2000 answer : b"
Answer: B