Underapplied manufacturing overhead means that the overhead assigned or applied to work in process is equal to the overhead incurred (actuals). overhead assigned or applied to work in process is less than the overhead incurred (actuals). overhead assigned or applied to work in process is more than the overhead incurred (actuals). direct materials costs and direct labor costs are insignificant compared to manufacturing overhead costs. In a large manufacturing company, the human resource manager's salary would most likely be classified as a: Manufacturing overhead cost. Selling cost. Period cost Product cost