Jammer Company uses a perpetual weighted average inventory system and reports the following: August 2 Purchase August 18 Purchase 23 units at $18.00 per unit. 25 units at $19.00 per unit. 46 units. 28 units at $21.00 per unit. August 29 Sale August 31 Purchase What is the per-unit value of ending inventory on August 31? (Round your per unit answers to 2 decimal places.) $18.52 $22.14 $20.83 $21.00 O $18.00