Suppose Stocks A, B and C are the only three component stocks in a benchmark index. The number of shares outstanding of Stocks A, B and C are 359,000 shares, 345,000 shares, and 240,000 shares, respectively. The prices of Stocks A, B and C for Days 1, 2, 3 and 4 are given in the table below:

	Stock A	Stock B	Stock C
Day 1	31.30	80.53	79.71
Day 2	31.34	38.81	79.69
Day 3	33.94	44.56	80.07
Day 4	33.25	44.16	78.78

Stock B had a 2-for-1 stock split on Day 2, which explained the drop in the price of Stock B.

If the benchmark value-weighted index was 1572.57 on Day 1, the benchmark value-weighted index on Day 4 was ??????

Can someone please explain how to get the answer?