View Policies Current Attempt in Progress Monthly production costs in Dilts Company for two levels of production are as follows. Cost 2,000 Units 4,000 Units Indirect labor $10,000 $20,000 Supervisory salaries 5,000 5,000 Maintenance 4,000 6,000 Indicate which costs are variable, fixed, and mixed. Indirect labor Supervisory salaries Maintenance Save for Later