Helena Company reports the following total costs at two levels of production Direct materials Maintenance Direct labor Indirect materials Depreciation Utilities Rent 10,000 Units $20,000 8,000 17,000 1,000 4,000 3,000 6,000 20,000 Units $40,000 10,000 34,000 2,000 4,000 5,000 6,000 Classify each cost as variable, fixed, or mixed Direct Materials I Choose ] Maintenance Choose ] Direct Labor Choose Indirect Materials I Choose ] Depreciation I Choose ] Utilities IChoose ] Rent IChoose]