Please help me with this question!

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 300 units. Unit Cost $ 70 Beginning Inventory Purchase Purchase Date January 1 January 15 January 24 Units 200 340 348 260 Total Cost $14,000 27,200 26,000 180 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 of units in ending Inventory. Ending Inventory units