can someone help me with questions 4-6 please?

4. Vektek, Inc. thinks machine hours is the best activity base for its manufacturing overhead. The estimate of annual overhead costs for its jobs was $820,000. The budgeted machine hours for the year totaled 20,000. The company used 1,000 machine hours of processing on Job No. B12 during the period. How much overhead should be applied to Job No. B12? a. $840 $41,000 $42,000 $820 b. d. 5. Redman Company manufactures customized desks. The following pertains to Job No. 978: Direct materials used $9,450 Direct labor hours worked 360 Direct labor rate per hour $15.00 Machine hours used 300 Applied factory overhead rate per machine hour $22.00 What is the total manufacturing cost for Job No. 978? $19,650 b. $21,450 C. $22,950 $24,750 0 6. Mango Company applies overhead based on direct labor costs. For the current year, Mango Company estimated total overhead costs to be $300,000, and direct labor costs to be $150,000. Actual overhead costs for the year totaled $330,000, and actual direct labor costs totaled $170,000. At year-end, Factory Overhead account is: a. Overapplied by $20,000 b. Overapplied by $170,000. c. Overapplied by $10,000. d. Underapplied by $10,000