please help , I need the answer very fast , I only have 30 minutes

Question 1 The following information is available for November 2018, for Golden Company Beginning inventory $ 80,000 Purchases 300,000 Purchase return 20,000 Sales 500,000 Sales discount 50,000 Gross profit percentage of sales 25% Using the gross profit method the estimated ending inventory is OA $85,000 OB $50,000 $22,500 OD $30,000