4.5 pts D Question 29 The predetermined manufacturing overhead rate is based on the budgeted amount of manufacturing overhead costs and the budgeted activity. At the end of the year, under-allocated overhead might be explained by which of the following combinations? Actual Activity Actual Manufacturing Overhead Costs No effect Greater than expected Actual Activity Actual Manufacturing Overhead Costs Greater than expected Greater than expected Actual Activity Actual Manufacturing Overhead Costs Greater than expected Less than expected Actual Manufacturing Overhead Costs Actual Activity Less than expected Greater than expected Actual Manufacturing Overhead Costs Actual Activity Less than expected Less than expected