You are provided with the following information: Selling price per unit $100 Variable expenses per unit $40 Fixed expenses per month $60,000 If the selling price per unit were to drop $2, from $100 to $98, the sales volume were to increase 500 units to 4.500 units per month and advertising expense were to increase by $1,000: the contribution margin ratio would increase. the break eve point in units would increase. operating income would decrease. the break-even point in revenue would decrease