Required information M7-20 to 22 (Algo) (Supplement 7A) Calculating Cost of Goods Sold and Ending Inventory under Perpetual FIFO, LIFO, and Weighted Average Cost [LO 7-S1] In its first month of operations, Literacy for the Illiterate opened a new bookstore and bought merchandise in the following order: (1) 400 units at $4 on January 1, (2) 600 units at $8 on January 8 , and (3) 880 units at $9 on January 29 . Assume 1,080 units are on hand at the end of the month. M7-22 (Algo) (Supplement 7A) Calculating Cost of Goods Sold and Ending Inventory under Perpetual Weighted Average Cost [LO 7-S1] Calculate the cost of goods available for sale, cost of goods sold, and ending inventory under the 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.)