Using the following information, compute the direct materials used. Raw materials inventory, January 1 Raw materials inventory, December 31 $15000 35000 Work in process, January 1 18000 Work in process, December 31 12000 Finished goods, January 1 40000 Finished goods, December 31 32000 Raw materials purchases 1600000 Direct labor 760000 Factory utilities 150000 Indirect labor 50000 Factory depreciation 400000 Operating expenses 420000 O $1650000. O $1600000. O $1580000. O $1615000.