43) Plato Company reports the following for the month of June. Date Explanation Units Unit Cost June 1 Inventory 225 $5 12 Purchase 525 6 23 Purchase 750 7 30 Inventory Total Cost $1,125 3,150 5,250 330 Instructions (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 570 units occurred on June 15 for a selling price of $8 and a sale of 600 units on June 27 for $9. (Note: For the average-cost method, round unit cost to three decimal places.) (b) Why is the average unit cost not $6 ($5 . $6. $7). 3 $6]? +