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5. Assume the following data with regard to inventory of Beta Company. Sep 1 Inventory 80 units @10 per unit Purchase 100 units @11 per unit Purchase 70 units @12 per unit Purchase 85 units @12 per unit Purchase 90 units @13 per unit Inventory, Sep 30 160 units Using the periodic inventory system, calculate the cost of the inventory at September 30 and the cost of goods sold in September under FIFO,LIFO, and average cost. 6. Assume the following data with regard to inventory of Beta Company. Sep 1 Inventory 80 units @10 per unit Purchase 100 units @11 per unit Purchase 70 units @12 per unit Purchase 85 units @12 per unit Purchase 90 units @13 per unit Sep Sale 90 units Sale 100 units 28 sale sale 75 units Using the perpetual inventory system, calculate the cost of the inventory at September 30 and the const of goods sold in September under FIFO and LIFO