Answer:
Product Cost Variable or Fixed
1. Depreciation on office equipment Fixed
2. Rubber core of football products Variable
3. Wages of custodial workers Fixed
4. Boxes for packaging footballs for sale Variable
5. Depreciation on leather-cutting equipment Fixed
6. Office manager's annual salary Fixed
Explanation:
Variable costs are those will vary will the change in sale or activity level e.g material cost, labor cost etc.
Fixed costs are those which remains fix and does not vary with the change in sale or activity level.