Classify each cost as variable, fixed, or mixed. Insurance on the buildings .. Property tax bill 1. Sales commission . Nails used to produce furniture 6. Fuel needed to operate the machinery 6. Hourly wages of the assembly-line workers 1. Rental of U-Haul charged based on daily rate plus 1. Depreciation on the building Rent paid for office space 5. Maintenance costs of delivery vans e Textbook and Media