Task: Question Answering
Input (English): Problem: a salesman ’ s terms were changed from a flat commission of 5 % on all his sales to a fixed salary of rs . 900 plus 2.5 % commission on all sales exceeding rs . 4,000 . if his remuneration as per new scheme was rs . 600 more than that by the previous schema , his sales were worth ? 
Options: a ) 10000 , b ) 12000 , c ) 12019 , d ) 12197 , e ) 12012
Output (English): a