A bicycle company has these costs: tires, salaries of employees who put tires on the wheels, factory building depreciation, lubricants, spokes, salary of factory manager, handlebars, and salaries of factory maintenance employees. Classify each cost as direct materials, direct labor, or manufacturing overhead.

Classify as direct materials any raw materials that can be physically and directly associated with the finished product.

Classify as direct labor the work of factory employees that can be physically and directly associated with the finished product.

Classify as manufacturing overhead any costs that are indirectly associated with the finished product.