Identify which of the following costs are product costs or period costs. Put "product" for product costs and "period" for period costs. 1. Copper purchased to make wire. 2. Rent at the storefront. 3. Depreciation on the salesperson's company vehicle. 4. Wages for security guard at the factory. 5. Production line supervisor's bonus. 6. Electricity bill at the corporate headquarters. 7. Corporate jet fuel costs. 8. Production facility cafeteria food costs. 9. Insulation installed in a refrigerator product. 10. Chief Executive Officer's salary.