An amount of sum is to be divided between A, B and C in the ratio of 1 : 3 : 4 in this month and the difference between B and C’s share is Rs. 1600. If the total amount becomes twice the next month, find the total amount of the sum in the next month.
ARs. 24800
BRs. 32000
CRs. 28800
DRs. 25600