A market value weighted index has three stocks in it, priced at 92.4, 88.8, and 91.9 per share, and each firm has 383, 285 and 493 thousand shares outstanding, respectively. The value of the index today is 584.1. Over the course of a month, the market does its random walk-y thing, and the prices of the three stocks change do 84.2, 50.3, 76.1, respectively. What is the new value of the index? Enter answer accurate to two decimal places