Assuming that the direct materials used are $1580000, compute the total manufacturing costs using the following information. Raw materials inventory, $20000 January 1 Raw materials inventory. 40000 December 31 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 Direct labor 760000 Factory utilities 150000 Indirect labor 50000 Factory depreciation 400000 Operating expenses 420000 $2760000. O $2940000. O $3360000. O $2946000.