QS 21-2 Cost behavior identification C1@n Determine whether each of the following is best described as a fixed, variable, or mixed cost with respect to product units. 1. 2. 3. Pack 4. 5. 6. 7. Rubber used to manufacture athletic shoes. Maintenance of factory machinery. Packaging expense. Wages of an assembly-line worker paid on the basis of acceptable units produced Factory supervisor's salary, Taxes on factory building. Depreciation expense of warehouse