Brief Exercise 22-01 Monthly production costs in Dilts Company for two levels of production are as follows. Cost 2,000 Units 4,000 Units Indirect labor Supervisory salaries Maintenance $10,000 5,000 4,000 $20,000 5,000 6,000 Indicate which costs are variable, fixed, and mixed. Indirect labor Supervisory salaries Maintenance Brief Exercise 22-06 Determine the missing amounts. Unit Selling Price Unit Variable Costs Unit Contribution Margin Contribution Margin % (b) % (d) Ratio 1. $750 $375 2. $450 $153 3. $760 40 %