Beginning of 2020 End of 2020 Direct materials inventory $ 50,000 70,000 Work-in-process inventory 310,000 270,000 Finished goods inventory 60,000 90,000 Assuming $390,000 raw materials purchased and $220,000 conversion costs added and expensed during the period, Calculate (compute) the raw materials used and the cost of goods sold during the period? Select one: a. $230,000 raw materials used and $490,000 cost of goods sold b. $330,000 raw materials used and $590,000 cost of goods sold C. $370,000 raw materials used and $690,000 cost of goods sold d. $330.000 raw materials used and $510,000 cost of goods sold e. $370,000 raw materials used and 5630,000 cost of goods sold