please help. theres 7 questions here.

Which of the following calculations can be used to measure a company's degree of operating leverage? Contribution marginet income Sales/Contribution margin Contribution margin/sales Sales/fixed costsRandall Company makes calendars. Information on cost per unit is as follows: Direct materials $2.80 Direct labor 1.10 Variable overhead 0.70 Variable marketing expense 0.40 Fixed marketing expense totaled $13,000 and xed administrative expense totaled $35,000. The price per calendar is $16. What is the contribution margin per unit? If variable costs per unit decrease, sales volume at the break-even point will O stay constant. 0 decrease. Miller Company's number of units to B/E is 3,500. The company has anticipated sales of 5,000 units. What is Miller's margin of safety in units? If the selling price per unit increases, the break-even point in units will 0 increase. 0 remain the same; however, contribution per unit will decrease. O remain the same. 0 decrease. Herndon & Butler Company sells a product for $25. Variable costs are $15 per unit, and total fixed costs are $12,000. How many units must be sold by Herndon & Butler to earn a profit of $4,000? 1,600 units 1,040 units 1,400 units 62 unitsWhich of the following would happen if a company increased unit variable cost for a product? Contribution Break-even Margin Point Increase Increase Increase Decrease Decrease Increase Decrease Decrease 0 Option D: Decrease; Decrease 0 Option C: Decrease; Increase 0 Option A: Increase; Increase 0 Option B: Increase; Decrease