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