RJ Corporation has provided the following information about one of its inventory items: Date Transaction Number of Units Cost per Unit 1/1 Beginning Inventory 428 $3,228 6/6 Purchase 828 $3,628 9/10 Purchase 1,228 $4,028 11/15 Purchase 828 $4,228 During the year, RJ sold 3,112 units. What was cost of goods sold using the average cost flow assumption