7. As production volume increases, a variable cost a. Increases on a per-unit basis b. Remains constant on a per-unit basis c. Remains constant in total d. Decreases in total e. None of the above 8. The predetermined overhead rate is developed from a. Forecast cost and forecast activity b. Forecast cost and actual activity c. Actual cost and forecast activity d. Actual cost and actual activity e. None of the above 9. Which of the following would not be a product cost for an automobile manufacturing firm? a. Sales commissions b. Steel c. Depreciation on factory equipment d. Salary for the production line supervisor e. All of the above are product costs 10. Which of the following is generally the most accurate cost estimation method? a Visual fit b. High-low c. Semi-averages d. Least-squares e. None of the above