Sprint LTE 9:55 AM 363:02:13 Exit Quality Car Wash has fixed costs per month of $16,800, and variable costs are 20% of sales. The average amount collected per car washed during the past year has been $5. How many cars must be washed per month to break even? Enter answer... 8. Define contribution margin. Is it best expressed as a total amount or as a per- unit amount? In what way is the term descriptive of the concept it represents? Enter answer... Chapter 7 Question:s Sprint LTE 9:55 AM 363:02:21 Exit What is variable costing? List its advantages and disadvantages. Enter answer... 10 Which method, absorption or variable costing, is used for internal management reporting purposes? Enter answer... Which method, absorption or variable costing, is used for external reporting purposes in accordance with generally accepted accounting principles? Enter