Use the information below to answer questions .

Aug. 1 Received 20 units at N60 each
Aug. 6 Received 20 units at N68 each
Aug. 10 Issued 16 units
Aug. 20 Received 40 units at N80 each
Aug. 31 Issued 48 units

Using the simple average method, what is the cost per unit of the closing stock?