please explain why those are the correct answer step by step

2. Bret Inc. manufactures mobiles. Last month, direct materials, electronic components, etc., costing $600,000 were put into production. Direct labor of $900,000 was incurred, manufacturing overhead equaled $600,000, and selling and administrative costs totaled $400,000. The company manufactured 9,000 mobiles during the month. Assume that there were no beginning or ending work in process balances. Calculate the total product cost. a. $2,400,000 b. $2,100,000 C. $1,900,000 d. $2,500,000 b 3. Alpha Inc. manufactures electronic gadgets. Last month, direct materials costing $500,000 were put into production. Direct labor of $600,000 was incurred, manufacturing overhead equaled $400,000, and selling and administrative costs totaled $500,000. The company manufactured 10,000 electronic gadgets during the month. Assume that there were no beginning or ending work in process balances. Calculate the per-unit prime cost. a. $190 b. $157 c. $110 d. $215