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 Kikis records show the following for the month of January. Sales totaled 310 units.

	Date	Units			Unit Cost			Total Cost
Beginning Inventory	January 1		140		$	85		$	11,900
Purchase	January 15		470			95			44,650
Purchase	January 24		240			115			27,600

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.