Task: Question Answering
Input (English): Problem: a shopkeeper buys two articles for rs . 1000 each and then sells them , making 40 % profit on the first article and 40 % loss on second article . find the net profit or loss percent ? 
Options: a ) 200 , b ) 278 , c ) 282 , d ) 400 , e ) 270
Output (English): d