Carver Packing Company reports total contribution margin of $80,960 and pretax net income of $25,300 for the current month. In the next month, the company expects sales volume to increase by 5%. The degree of operating leverage and the expected percent change in income, respectively, are: 2.5 and 13% 32 and 5% 031 and S% 031 and 2.9% 32 and 10%