Jammer Company uses a weighted average pepetual inventary sstem and reports the following: Date Activities Units Acquired at Cost Units Sold at Retall August 2 Purchase 10 units @ $18=$180 August 18 Purchase 15 units @$21=$315 August 29 Sales 20 units sold August 31 Purchase 14 units @$22=$308 What is the per unit value of ending inventory on August 31? Arswrs shouddo rounded to the nearest cent. $21.42