Which inventory method was used to calculate cost of goods sold, based on the information above? Purchased Units Unit Cost Total Cost November 70 $24 $1,680 December 60 $26 $1,560 January 80 $25 $2,000 Units Available 210 $5,240 for Sale Ending Inventory Units Sold in 180 February Units on Hand 30 Cost of Goods Sold: $4,520