Willie Nelson's Boots uses the conventional retail method to estimate ending inventory. Cost data for the most recent quarter is shown below: Cost Retail Beginning inventory $45,000 $62,000 Net purchases 165,000 219,000 Net markups 19,000 Net markdowns 40,000 Net sales 230,000 To the nearest thousand, estimated ending inventory using the conventional retail method is (Do not round intermediate calculations): $16,000. $21,000. $39,000. $9,000.