I need the correct answer to this general accounting problem using the standard accounting approach.

Delta Manufacturing, Inc., which uses a predetermined overhead rate based on direct labor hours. Use the information below to answer the following 3 questions: Item Amount | Estimated Manufacturing Overhead $180,000 Estimated Direct Labor-Hours 10,000 hours | L | | Actual Manufacturing Overhead $190,000 'Actual Direct Labor-Hours 9,200 hours | L _| a. Calculate Delta's predetermined overhead rate. b. Calculate Delta's applied overhead. c. How much was Delta's over- or under-applied overhead