Bridgeport Inc. uses the retail inventory method to estimate ending inventory for its monthly financial statements. The following data pertain to a single department for the month of October 2021. Inventory, October 1, 2021 At cost At retail Purchases (exclusive of freight and returns) $52,600 76,500 At cost At retail Freight-in 260,388 431,300 16,900 Purchase returns At cost 5,600 At retail 7,900