Task: Question Answering
Input (English): Problem: a person spends 40 % of his salary on food , 25 % on house rent , 15 % on entertainment and 5 % on conveyance . if his savings at the end of the month is rs . 2700 , then his salary per month in rupees is : 
Options: a ) 4000 , b ) 6000 , c ) 18000 , d ) 10000 , e ) none of these
Output (English): c