10 The amount of materials posted on a job cost sheet is supported by what source document? 11 The amount of direct labor posted on a job order cost sheet is supported by what source document? The materials cost of Job A-$1,500 Direct Labor Cost-$396 ($18 per hour) Total Cost of Job A is $2,391. 12 MFO is applied on the basis of direct labor hours What is the predetermined overhead rate per direct labor hour? What is the predetermined overhead rate as a percentage of the direct labor cost