Answer:
1. Wages of assembly line workers  - Product cost - Direct labor - Prime and conversion
2. Wages of the office receptionist  - Period cost
3. Property taxes on the factory - Product cost  - Manufacturing overhead - Conversion
4. Sugar and flour used to make cookies - Product cost  - Direct materials - Prime
5. Salary of the factory maintenance supervisor  - Product cost  - Manufacturing overhead - Conversion
6. Salary of the sales manager - Period cost