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Patrick Company 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 that their records show the following for the month of January.... Sales totalled 500 units Beginning Inventory Purchase Purchase Date January 1 January 15 January 24 Units Unit Cost Total Cost 100 $10 $1,000 400 8 3,200 200 11 2,200 1. Calculate the number and cost of goods available for sale units $ 2. Calculate the number of units in ending inventory units 3. Calculate the cost of ending inventory and cost of goods sold using these methods: FIFO $ $ Ending Inventory Cost of Goods Sold $ Weighted Average Ending Inventory $ $ Cost of Goods Sold