M7-15 (Supplement 7A) Calculating Cost of Goods Sold and Ending Inventory under Perpetual FIFO, LIFO, and Weighted Average Cost [LO 7-S11 In its first month of operations, Literacy for the Iliterate opened a new bookstore and bought merchandise in the following order: (1) 400 units at $9 n January 1, (2) 600 units at $10 on January 8, and (3) 790 units at S11 on January 29. Assume 990 units are on hand at the end of the month. Calculate the cost of goods available for sale, cost of goods sold, and ending inventory under the (a) FIFO, b) LIFO, and (c) weighted average cost flow assumptions. Assume perpetual inventory system and sold 800 units between January 9 and January 28. (Round your intermediate calculations to 2 decimal places.) Weighted Average Cost FIFO LIFO Goods Available for Sale Cost of Goods Sold Ending Inventory