7) Compute weighted average cost per unit of inventory at 2/18/X3?

8) Compute weighted average cost per unit of inventory at 12/31/X3?

9) Calculate cost of goods sold for the sale that occurred on 1/22/X3.

10) Calculate cost of goods sold for the sale that occurred on 12/31/X3.

11) Calculate the ending inventory balance at 12/31/X3 in DOLLARS.

12) Calculate the ending inventory balance at 12/31/X3 in UNITS.