direct material and direct labor are called conversion costs True False Question 14 3 pts direct labor and manufacturing overhead are called prime costs True False Question 15 5 pts Henderson Corporation uses direct labor-hours in its predetermined overhead rate. At the beginning of the year, the estimated direct labor-hours were 17.500 hours. At the end of the year, actual direct labor-hours for the year were 16,000 hours, the actual manufacturing overhead for the year was $233,000, and manufacturing overhead for the year was underapplied by $15,400. The estimated manufacturing overhead at the beginning of the year used in the predetermined overhead rate must have been: 228000 217600 none of the above