单选题 An index was recently begun with the following two stocks: Company A -50 shares valued at $ 2 each. Company B - 10 shares valued at $10 each. Given that the value-weighted index was originally set at 100 and Company A's stock is currently selling for $ 4 per share while Company B's stock is still at $10 per share, what is the current value of the price-weighted index and the value-weighted index? Price -weighted Value -weighted ①A. 7 300 ②B. 8 150 ③C. 7 150 A. ①B. ②C. ③