Oahu Kiki tracks the number of units purchased and sold throughout each accounting period but applies its inventory costing method at the end of each month, as if it uses a periodic inventory system. Assume Oahu Kiki's records show the following for the month of January. Sales totaled 320 units. Unit Cost $ 70 Beginning Inventory Purchase Purchase Date January 1 January 15 January 24 Units 180 490 280 Total Cost $ 12,600 39,200 28,000 80 100 Required: 1. Calculate the number and cost of goods available for sale. 2. Calculate the number of units in ending inventory. 3. Calculate the cost of ending inventory and cost of goods sold using the (a) FIFO, (b) LIFO, and (c) weighted average cost methods. Complete this question by entering your answers in the tabs below. Required 1 Required 2 Required 3 Calculate the number and cost of goods available for sale. units Number of Goods Available for Sale Cost of Goods Available for Sale Required 1 Required 2 > Complete this question by entering your answers in the tabs below. Required 1 Required 2 Required 3 Calculate the number of units in ending inventory. Ending Inventory units Complete this question by entering your answers in the tabs below. Required 1 Required 2 Required 3 Calculate the cost of ending inventory and cost of goods sold using the (a) FIFO, (b) LIFO, and (c) weighted average cost methods. Cost of Ending Cost of Goods Inventory Sold FIFO LIFO Weighted Average Cost