Swifty Enterprises reported cost of goods sold for 2020 of $1,453,700 and retained earnings of $5,392,600 at December 31, 2020. Swifty later discovered that its ending inventories at December 31, 2019 and 2020, were overstated by $102,820 and $37,880, respectively. Determine the corrected amounts for 2020 cost of goods sold and December 31, 2020, retained earnings.