Task: Question Answering
Input (English): Problem: a trader purchased two colour televisions for a total of rs . 35000 . he sold one colour television at 30 % profit and the other 40 % profit . find the difference in the cost prices of the two televisions if he made an overall profit of 30 % ? 
Options: a ) rs . 28985 , b ) rs . 40985 , c ) rs . 20985 , d ) rs . 21000 , e ) rs . 30985
Output (English): c