BE 5-4 INSTRUCTIONS: Identify the costs as variable, fixed or mixed by placing an X in the proper column 1 Wood used in the production of furniture. 2 Fuel used in delivery trucks. 3 Straight-line depreciation on factory building. 4 Screws used in the production of furniture. 5 Sales staff salaries. 6 Sales commissions 7 Property taxes. 8 Insurance on buildings. 9 Hourly wages of furniture craftsmen. 10 salaries of factory supervisors. 11 Utilities expense. 12 Telephone bill. Variable Fixed Mixed