Identify by letters the costs in the preceding question that would be classified as product costs and as period costs.

Sheet aluminum. Wages cf drill press cperatcrs. Gil fcr factcrry machlnes. a h c. d. Salary cf ccmpany president. e Factcry superciscrs' salaries. f Sales salaries. E- Factcry building Insurance. h. Wages ef assemblers. |. Salaries n'f Inspectors. j. Lumber. It. Fasten! aemuntant's salary. Executlue afne rent. n1. Halls and staples. n Purchasing agent's salary.