On Off ompany Company Materials inventory, December 1 $63,810 $86,780 Materials inventory, December 31 (a)98,060 Materials purchased 162,080 195,260 171,010 Cost of direct materials used in production Direct labor 240,560 74,660 97,190 Factory overhead Total manufacturing costs incurred in December (b) 561,470 Total manufacturing costs 608,750 608,750 Work in process inventory, December 1 122,520 209,140 Work in process inventory, December 31 103,370 (c) 556,260 Cost of goods manufactured 97,190 Finished goods inventory, December1 107,840 Finished goods inventory, December 31 112,940 Sales 940,560 867,800 Cost of goods sold (d) 561,470 Gross profit 122,520 Operating expenses (f) 192,650 Net income Required: 1. Determine the amounts of the missing items, identifying them by letter. Enter all amounts as positive numbers. On Company Off Company Letter 486,230 b. C. d. e