The costs listed below are incurred by a furniture manufacturer. Identify each cost as a variable cost, fixed cost, or mixed cost.

1. 1. Wood used in the production of furniture.
2. 2. Straight-Line depreciation on the factory building.
3. 3. Sales staff salaries, including sales commissions.
4. 4. Property taxes on factory building and equipment.
5. 5. Hourly wages of furniture craftsmen.
6. 6. Fuel used in delivery trucks.
7. 7. Salaries of factory supervisors.
8. 8. Cell phone bill, flat rate plus $,10 for every minute over 100.
9. 9. Property insurance on office building.
10. 10. Salary of the president of the company.