I am stuck on the ending inventory cost. please help!

Aircard Corporation tracks the number of units purchased and sold throughout each accounting period but applies its inventory costing method at the end of each period as if it uses a perpetual inventory system. The following are the transactions for the month of July. Required: Colculate the cost of ending inventory and cost of goods sold assuming a perpetual inventory system is used in combination with (a) FIFO and (b) LIFO. equired: Calculate the cost of ending inventory and cost of goods sold assuming a perpetual inventory system is used in combination w FFO and (b) LIFO. Complete this question by entering your answers in the tabs below. Calculate the cost of ending inventory and cost of goods sold assuming a perpetual inventory system is used in combination with LIFO