A company has the following inventory information and uses the periodic system: May 1 Beginning Inventory 18 units at $1 each May 4 Purchase 11 units at $2 each May 7 Sale 21 units The company uses the weighted average method of inventory costing. What is the cost of goods sold and the ending merchandise inventory? O A. COGS $11.04; Merchandise Inventory $28.98 B. COGS $39.90; Merchandise Inventory $15.20 OC. COGS $15.20; Merchandise Inventory $39.90 OD. COGS $28.98; Merchandise Inventory $11.04