Task: Question Answering
Input (English): Problem: a trader sells 40 metres of cloth for rs . 8200 at a profit of rs . 20 per metre of cloth . how much profit will the trder earn on 40 metres of cloth ? 
Options: a ) rs . 800 , b ) rs . 1500 , c ) rs . 1000 , d ) rs . 1200 , e ) none of these
Output (English): a