January 1, 2020 2020 December 31, 2020 Raw materials inventory $26,020 $33,480 16,380 Work in process inventory Finished goods inventory 19,230 28,180 25,930 Materials purchased $155,040 Direct labor 223,300 Manufacturing overhead 181,490 Sales revenue 902,520 January 1, 2020 2020 December 31, 2020 Raw materials inventory $26,020 $33,480 Work in process inventory 16,380 19,230 28,180 25,930 Finished goods inventory Materials purchased $155,040 Direct labor 223,300 Manufacturing overhead 181,490 Sales revenue 902,520 (a) Compute cost of goods manufactured