please help me calculate the weighted average perpetual.

Required information [The following information applies to the questions displayed below.] Warnerwoods Company uses a perpetual inventory system. It entered into the following purchases and sales transactions for March. - Compute the cost assigned to ending inventory using (a) FIFO, (b) LIFO, (c) weighted average, and ( d ) specific identification. For pecific identification, units sold include 65 units from beginning inventory, 195 units from the March 5 purchase, 45 units from the larch 18 purchase, and 85 units from the March 25 purchase