San Lorenzo General Store uses a periodic inventory system and the retail inventory method to estimate ending inventory and cost of goods sold. The following data are available for the month of October 2018: Beginning inventory Net purchases Net markups Net markdowns Net sales Cost $39,000 17,290 Retail $54,000 32,000 1,600 1,000 36,000 Required: Complete the table below to estimate the average cost of ending inventory and cost of goods sold for October. Cost es Retail Cost-to-Retail Ratio Beginning inventory Plus Net purchases Net markups Less: Net markdowns Goods available for sale 0 0 Cost-to-retail percentage 4 Less Net sales Estimated ending inventory at retail Estimated ending inventory at cost Estimated cost of goods sold