I know the answer is 106.58 or 104.32 but show the work please on how to get to that answer

Question 4 0/1 point Qo P1 A $80 100 $95 100 B $50 200 $45 200 100 200 $110 200 The value-weighted S&P 500 type index at T=1 for the three stocsks assuming a base value of 100 is closest to: a) 108.69 b) 104.32 c) 106.58 d) 105.78 e) 93.83