Selina invested a certain amount with her in a 6% stock at 84 and an equal sum of money in an 8% stock at 112. Justin invested a certain amount with him in a 12% stock at 132 and an equal sum of money in a 4% stock at 128. Find the investment made by Selina given that she invested Rs. 1640 more than Justin did and the difference in the earnings of both is Rs. 156.
A) 5439.66
B) 9435.66
C) 3549.66
D) 5394.66