Bear Publishing sells a nature guide. The following information was reported for a typical month (sales volume is constant each month): Total Per Unit Sales $17,600 $16.00 Variable expenses $9,680 $8.80 Contribution margin $7,920 $7.20 Fixed expenses $3,600 Net operating income $4,320 Bear is expecting a 20-cent increase in variable expenses. No other changes are expected or planned. How much contribution margin should Bear expect after the increase