Task: Question Answering
Input (English): Problem: a shopkeeper sells 10 % of his stock at 20 % profit ans sells the remaining at a loss of 5 % . he incurred an overall loss of rs . 400 . find the total worth of the stock ? 
Options: a ) 20000 , b ) 16000 , c ) 18000 , d ) 17000 , e ) 15000
Output (English): b