Cannot figure out the remaining blank questions

E. CUSully lawui. 5. Steel Works, Inc, incurred the following costs during May: (1) Depreciation of factory equipment. (2) Printing of employee training materials (3) Office supplies for the chief financial officer. (4) Indirect materials. (5) Salary of the product quality inspector. (6) Salary of the company's internal auditor. Which of these costs would be classified as period costs? A. B. C. D. E. 1, 2, 6. 1,4,5. 1, 2, 4, 6. 2, 3, 6. All of the above. The three maior cost comnonents of a manufactured product are