The following information is taken from the inventory records of the CNB Company for the month of September. Assuming that CNB uses a periodic inventory system and employs the average cost method, determine cost of goods sold for September and September's ending inventory. Repeat requirement 1 assuming that the company uses a perpetual inventory system. Repeat requirement 1 assuming that the company uses a perpetual inventory system. (Enter inventory reductions for sales with a minus sign. Round "Average Cost per Unit" to 2 decimal places.)