Classify each of the following costs as Product (direct/indirect) or Period and Variable, Fixed or Mixed.

1. Wages of assembly line workers: direct/indirect/period

variable/fixed/mixed

2. Depreciation of plant equipment

direct/indirect/period

variable/fixed/mixed

3. Glue and nails for production

direct/indirect/period

variable/fixed/mixed

4. Outbound delivery expenses

direct/indirect/period

variable/fixed/mixed

5. Raw materials handling cost

direct/indirect/period

variable/fixed/mixed

6. Production run setup costs

direct/indirect/period

variable/fixed/mixed

7. Administrative office utilities

direct/indirect/period

variable/fixed/mixed

8. Electricity cost of retail stores

direct/indirect/period

variable/fixed/mixed

9. Research and development expense

direct/indirect/period

variable/fixed/mixed

10. Salary of marketing manager

direct/indirect/period

variable/fixed/mixed