A, B, and C jointly begin a business. A invests Rs. 6,500 for 6 months. B invests Rs. 8,400 for 5 months, and C invests Rs. 10,000 for 3 months. A is the working partner and receives 5% of the profit for day-to-day management of the business. The profit earned was Rs. 7,400. Calculate the share of B in the profit