An investment portfolio consists of four stocks. The purchase price, current price, and number of shares are reported in the following table. (Round your answer to the nearest integer.) Stock Purchase Current Number Price/Share ($) Price/Share ($) of Shares Stock A 1,272.00 1,933.78 600 Stock B 197.87 178.23 300 Stock C 178.23 208.99 400 Stock D 94.18 97.13 200 Construct a weighted average of price relatives as an index of the performance of the portfolio to date. I= Interpret this price index. The investment portfolio value is up