Classify each of the following as Direct or Indirect (DorI) with respect to traceability to product and as Variable or Fixed (V or F) with respect to whether the cost fluctuates in total as activity or volume changes over wide ranges of activity. ( 10 pts.) 7. Factory rent 8. Welding supplies 9. Fabric for a clothes manufacturer 10. Cement for a road builder 11. Glue used in textbooks production 12. Paint for automobiles 7. _ Supervisory salaries 8. _ Plastic washers used in auto production 9. _ Clay used in brick production 10. Assembly line workers' salaries