answer please with proper justification about each step

veoae urs anu cuss HOUSTON ELECTRONICS Astro Condensers Total Balance Unit Explanation Beginning inventory Purchases Date Units Cost Cost in Units S 1,000 1/1 100 $10 100 4/15 200 11 2,200 3,600 300 8/24 Purchases 300 12 600 9/10 Sale 550 50 Purchases 11/27 400 13 5,200 450 $12,000 Assuming the Perpetual Inventory System, compute Cost of Goods Sold and Ending Inventory under FIFO, LIFO, and average-cost