Brief Exercise 8-7 (Algo) Inventory cost flow methods; periodic system [LO8-4] Samuelson and Messenger (SAM) began 2021 with 320 units of its one product. These units were purchased near the end of 2020 for $22 each. During the month of January, 160 units were purchased on January 8 for $25 each and another 320 units were purchased on January 19 for $27 each. Sales of 160 units and 280 units were made on January 10 and January 25 , respectively. There were 360 units on hand at the end of the month. SAM uses a periodic inventory system. Required: 1. Calculate ending inventory and cost of goods sold for January using FIFO. 2. Calculate ending inventory and cost of goods sold for January using average cost. Complete this question by entering your answers in the tabs below. Calculate ending inventory and cost of goods sold for January using FIFO