company took place during the month of September 2015. [10 Marks) September 1 Opening inventory 100 units at P15 per unit Issued to production 60 units 13 Purchased from supplier 120 units at P16 per unit 18 Issued to production 130 units 23 Purchased from supplier 200 units at P17 per units 26 Issued to production 170 Required: Calculate the value of closing stock on 30 September (assume there are no Work-in Progress units) using: (a). FIFO (3 Marks) (b). LIFO (3 Marks) (c). Weighted Average cost (4 Marks)