Hadley Bear, Inc. uses a periodic inventory system. At the end of the January 31, 2017, the accounting records for the most popular item in inventory showed the following: Transactions Units Unit Cost Beginning Inventory, Jan 1 350 $1 Purchases January 10 450 $4 Purchase, January 30 200 $7 Hadley Bear sells the units for $20 each. At the end of the period, Hadley Bear has 180 units remaining in inventory. What is the cost of goods sold if Hadley Bear uses the average cost method?