Task: Question Answering
Input (English): Problem: the sale price of an article including the sales tax is rs . 616 . the rate of sales tax is 10 % . if the shopkeeper has made a profit of 12 % , then the cost price of the article is 
Options: a ) rs . 500 , b ) rs . 515 , c ) rs . 550 , d ) rs . 600 , e ) none
Output (English): a