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'.

[EX Q]: Problem: from the sale of sleeping bags , a retailer made a gross profit of 14 % of the wholesale cost . if each sleeping bag was sold for $ 28 , what was the wholesale cost per bag ? 
Options: a ) 3.0 , b ) 3.36 , c ) 24.56 , d ) 25.0 , e ) 31.36
[EX A]: c

[EX Q]: Problem: mr . karan borrowed a certain amount at 6 % per annum simple interest for 9 years . after 9 years , he returned rs . 8310 / - . find out the amount that he borrowed . 
Options: a ) s . 5266 , b ) s . 5396 , c ) s . 5228 , d ) s . 5218 , e ) s . 52192
[EX A]: b

[EX Q]: Problem: by investing in 1623 % stock at 64 , one earns rs . 1600 . the investment made is 
Options: a ) s . 9600 , b ) s . 7500 , c ) s . 5640 , d ) s . 6144 , e ) s . 6760
[EX A]:
d