The inventory at September 1 and the purchases during September of Hanna Ltd.'s raw material were as follows: Date Sept 1 Sept 5 Sept 14 Sept 27 Sept 29 Explanation Opening inventory Purchase Purchase Purchase Purchase Quantity 1,000 kg 3,000 kg 3,500 kg 3,000 kg 1,000 kg Amount $4,500 $13,500 $17,500 $16,500 $8,000 The inventory at September 30th is 1,800 kilograms. Assume a periodic inventory system. REQUIRED: Compute the cost of the inventory on September 30 under each of the following cost flow assumptions: a. FIFO b. Weighted Average c. LIFO