Marvalo Gaunt's Jewelry Shoppe has the following data for the year 2021 Beginning inventory Net purchases Net markups Net markdowns Net sales Cost $192, 780 559,980 Retail $306,000 890, 800 57,800 30,600 841,500 Estimate ending inventory (at cost) and cost of goods sold using each of the retail inventory methods specified. Average Conventional LIFO Estimate ending inventory at cost and cost of goods sold using the average cost retail inventory method. Ending Inventory (at cost) Cost of Goods Sold