The 123 Accounting Company sells accounting videos. The following information has been extracted from the records of 123 Accounting Co. January 1: Opening Inventory is 60 units @$10leach January 10: Bought 100 units @$11 each January 15: Bought 100 units @$13 each January 20: Sold 220 units @$20 each January 25: Bought 40 units @ $15 each If 123 Accounting uses the weighted average method of inventory and the perpetual methoc then the average cost of each unit charged to cost of sales when the sale is made will be: $10 $13.27 None of the above $11.54 $10.63