From To Activity 08:00 09:00 Worked on Job order Nr.145 09:00 09:30 Waited for direct materials 09:30 13:30 Worked on job order Nr.146 13:30 14:00 Setup a machine for job Order Nr.146 14:00 16:00 Worked on Job Order Nr.147 16:00 17:00 Cleaning Of Machines What is the amount of indirect labor cost for this worker for this day ? a) 20 c) 30 b) 0 d)15 c) None of these