Kaleta Company reports the following for the month of June. (a) Calculate the cost of the ending inventory and the cost of goods sold for each cost flow assumption, using a perpetual inventory system. Assume a sale of 440 units occurred on June 15 for a selling price of $8 and a sale of 360 units on June 27 for $9. (Round average cost per unit to 3 decimal places.) (b) How do the results differ from E6-6 and E6-8? (c) Why is the average unit cost not $6 [($5 + $6 + $7) 3 = $6]