Required information [The following information applies to the questions displayed below.] Warnerwoods Company uses a periodic inventory system. It entered into the following purchases and sales transactions for March. For specific identification, units sold include 40 units from beginning inventory, 400 units from the March 5 purchase, 60 units from the March 18 purchase, and 140 units from the March 25 purchase. 3. Compute the cost assigned to ending inventory using (a) FIFO, (b) LIFO, (c) weighted average, and (d) specific identification. (Round your "average cost per unit" to 2 decimal places.) c) Average Cost