Cost Behavior Cover-to-Cover Company is a manufacturer of shelving for books. The company has compiled the following cost data, and wants your help in determining the cost behavior. After reviewing the data, complete requirements (1) and (2) that follow. Units Produced Total Lumber Cost Total Total Machine Utilities Depreciation Cost Cost 13,000 shelves $130,000 $15,950 $120,000 26,000 shelves 260,000 30,900 120,000 52,000 shelves 520,000 60,800 120,000 65,000 shelves 650,000 75,750 120,000 1. Determine whether the costs in the table are variable, fixed, mixed, or none of these. Lumber Variable Cost Utilities Mixed Cost Depreciation Fixed Cost