Craig Company buys and sells one product

Craig Company buys and sells one product. Its beginning inventory, purchases, and sales during calendar year 2015 follow:

Additional tracking data for specific identification: (1) January 15 sale—200 units @ $14, (2) April 1 sale—200 units @ $15, and (3) November 1 sale—200 units @ $14 and 100 units @ $20.
Required

1)Calculate the cost of goods available for sale.

Apply the four different methods of inventory costing (FIFO, LIFO, weighted average, and specific identification) to calculate ending inventory and cost of goods sold under each method using the perpetual system