In this task, you need to answer the given multiple-choice question on the gain. Gain is the value by which to multiply the input. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

[Q]: Problem: by selling an article at rs . 600 , a shopkeeper makes a profit of 25 % . at what price should he sell the article so as to make a loss of 25 % ?
Options: a ) s . 360 , b ) s . 480 , c ) s . 500 , d ) s . 450 , e ) s . 550
[A]: a

[Q]: Problem: a sum fetched a total simple interest of 4034.25 at the rate of 9 % . p . a . in 5 years . what is the sum ?
Options: a ) 5768 , b ) 8925 , c ) 8965 , d ) 6474 , e ) 8723
[A]: c

[Q]: Problem: a shopkeeper sells 500 metres of cloth for rs . 15000 at a loss of rs . 10 per metre . find his cost price for one metre of cloth ?
Options: a ) s . 40 , b ) s . 12 , c ) s . 96 , d ) s . 50 , e ) s . 13
[A]:
a