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Chapter 18 Homework, Part 1 Saved Help Save & Exit Submit Check my work Identify whether each of the following is best described as a fixed, variable, or mixed cost with respect to product units points Book 1. Rubber used to manufacture athletic shoes 2. Maintenance of factory machinery 3. Packaging expense. 4. Wages of an assembly-line worker paid on the basis of acceptable units produced, 5. Factory supervisor's salary. 6. Taxes on factory building 7. Depreciation expense of warehouse