The following data (in thousands of dollars) have been taken from the accounting records of Rayburn Corporation for the current year: Sales Selling expenses $1,980 280 Factory overhead 460 Direct labor Administrative expenses 400 300 Direct materials purchased during year 240 Finished goods inventory, January 1 Finished goods inventory, December 31 Materials inventory, January 1 240 320 80 Materials inventory, December 31 140 Work in process inventory, January 1 Work in process inventory, December 31 Required: 140 100