Marvalo Gaunt's Jewelry Shoppe has the following data for the year 2021 Cost Retail Beginning inventory $ 283,500 $ 450,000 Net purchases 823,500 1,310,000 Net markups 85,000 Net markdowns 45,000 Net sales 1,237,500 Estimate ending inventory (at cost) and cost of goods sold using the average cost retail inventory method.