Question 15 2 pts Given the following cost data, what type of cost is shown? Cost per # of units unit $5,000 1 $2,500 2 $1,667 3 1,2504 O mixed cost variable cost O fixed cost O none of the above Question 16 2 pts What ratio indicates the percentage of each sales dollar that is available to cover fixed costs and to provide a profit? Margin of safety ratio O Contribution margin ratio OCosts and expenses ratio O Proft ratio