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 60 units from beginning inventory, 420 units from the March 5 purchase, 100 units from the March 18 purchase, and 180 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. (Roul your "average cost per unit" to 2 decimal places.) c) Average Cost