Subject: mathqa
Question: a , b and c , each working alone can complete a job in 6 , 8 and 12 days respectively . if all three of them work together to complete a job and earn $ 2200 , what will be c ' s share of the earnings ?
Option: 
A: $ 788.9
B: $ 488.9
C: $ 480.9
D: $ 588.9
Answer: B