Parker Inc. uses a periodic inventory system. Its beginning inventory in 2016 was $100,000 and it had an ending inventory for that year of $90,000. Parker had gross purchases for the year of $350,000 and took a total of $25,000 in purchase discounts. Parker's "Cost of Goods Sold" for 2016 : $325,000 $335,000 OC $425,000 $515,000