How can I calculate FIFO, LIFO, and Weighted Average?

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 270 units. Date Units Unit Cost Total Cost Beginning Inventory January 1 220 $ 85 $18,700 Purchase January 15 480 95 45,600 Purchase January 24 200 115 23,000 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 number and cost of goods available for sale. Number of Goods Available for Sale Cost of Goods Available for Sale Required 2 >