Answer:
The average cost per unit is $ 21.15 for 1,000 unit.
Inventory  Purchase  Final Â
Q Cost  Q Cost  Q Cost Â
PURCHASE Â 290.00 Â 18.00 Â 5,220.00 Â 400.00 Â 22.00 Â 8,800.00 Â 690.00 Â 20.32 Â 14,020.00 Â
PURCHASE Â 690.00 Â 20.32 Â 14,020.00 Â 310.00 Â 23.00 Â 7,130.00 Â 1,000.00 Â 21.15 Â 21,150.00 Â