A and B started a business in which A invested Rs. 12000 less than B. B left the business after 8 months. If B receives Rs. 4800 out of the total profit Rs. 7680 after one year. Find the initial investment of B?
1
Rs. 30000
2
Rs. 36000
3
Rs. 24000
4
Rs. 20000
5
Rs. 28000