21. with solutions please

Problem Solving: Kape Packing Company reports total contribution margin of $72,000 and pretax net income of $24,000 for the current month. In the next month, the company expects sales volume to increase by 8%. The degree of operating leverage and the expected percent change in income, respectively, are: 0.33 and 8% O 3.0 and 24% 4.0 and 32% 3.0 and 8%