When 50 million corresponds to 4000 and 4500 CSI 300, the corresponding fund is 5000 x9/8 = 5625 million.

Annual interest10% x 50 million = 5 million, balance of payments 5625-5500 =1250,000, net income1250,000.

Option a

Remember to give praise, how can this level be mixed in the circle?