A market value weighted index has three stocks in it, priced at 91.6, 96.4, and 72.9 per share, and each firm has 430, 447 and 254 thousand shares outstanding, respectively. The value of the index today is 622.8. Over the course of a month, the market does its random walk-y thing, and the prices of the three stocks change do 89.4, 74.5, 76.1, respectively. What is the new value of the index? Enter answer accurate to two decimal places