Answer the following questions (1) What are the source documents for direct materials, direct fabor, and manufacturing overhead costs assigned to this job? A job cost sheet of Ivanhoe Company is given below. Cost of completed job: (1) What are the source documents for direct materials, direct labor, and manufacturing overhead costs assigned to this job? (2) Overhead is applied on the basis of direct labor cost. What is the predetermined manufacturing overhead rate? Predetermined manufacturing overhead rate (3) What are the total cost and the unit cost of the completed job? (Round unit cost to 2 decimal places, es. 1.25.) Total cost of the completed job Unit cost of the completed job