Purchases and sales of Bison Co. during its first year of operation are as follow: Purchases Sales January: 21 units at $195 15 units February 31 units at $200 18 units May: 26 units at $205 22 units September 23 units at $210 21 units November 21 units at $215 22 units Ending Inventory on December 31 were 24 units. Calculate the cost of ending invertory assuming the perpetual LIFO Inventory costing method is used. (Assume all sales were made on the last day of the month) Multiple Choice $10,389 $12.921 $15,340 Multiple Choice $10,389. $12,921 O $15,340 $1,800 $9.951