Please answer all of the questions.

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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