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 330 units. Beginning Inventory Purchase Purchase Date January 1 January 15 January 24 Unita 300 400 300 Unit Cost Total Cost $ 90 $27,000 100 40,000 120 36,000 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 cost of ending Inventory and cost of goods sold using the (a) FIFO, (b) LIFO, and (c) weighted average cost methods, Cost of Ending Inventory Cost of Goods Sold FIFO LIFO Weighted Average Coul