EA3. LO 4.2 Burnham Industries incurs these costs for the month: Direct materials Direct labor Factory depreciation expense Factory utilities expense CEO's salary $2,000 3,000 3,500 750 4,000 A. What is the prime cost? B. What is the conversion cost? EA4. LO 4.3 Marzoni's records show raw materials inventory had a beginning balance of $200 and an ending balance of $300. If the cost of materials used during the month was $900, what were the purchases made during the month? EA5. LO 4.3 Sterling's records show the work in process inventory had a beginning balance of $4,000 and an ending balance of $3,000. How much direct labor was incurred if the records also show: Materials used Overhead applied Cost of goods manufactured $1,500 500 7,500