Task: Question Answering
Input (English): Problem: a dealer offers a cash discount of 15 % and still makes a profit of 36 % when he further allows 25 articles to be sold at the cost price of 20 articles to a particular sticky bargainer . how much percent above the cost price were his articles listed ? 
Options: a ) 60 % , b ) 80 % , c ) 100 % , d ) 120 % , e ) 150 %
Output (English): c