A watch was sold at a loss of 10%. If it was sold for Rs.540 more, there would have been a gain of 8%. What is the cost price?	Pick one.
A) 1000
B) 2998
C) 3000
D) 2788
E) 2991

Rationale: "90 % 108 % - - - - - - - - 18 % - - - - 540 100 % - - - - ? = > rs . 3000 answer : c"
Answer: C