Find the third-degree polynomial f(x) using Lagrange interpolation satisfying the following data
Х
0
2.
3
6
у
659 705 729 804​

2. using calculations based on a perpetual inventory system, determine the inventory balance altira would report in its august 31, 2021, balance sheet and the cost of goods sold it would report in its august 2021 income statement using the average cost method. (round "average cost per unit" to 2 decimal places.)