Task: Question Answering
Input (English): Problem: a and b undertake to do a piece of work for $ 600 . a alone can do it in 6 days while b alone can do it in 8 days . with the help of c , they finish it in 3 days . find the share of a ? 
Options: a ) $ 100 , b ) $ 150 , c ) $ 300 , d ) $ 250 , e ) $ 350
Output (English): c