2 [CLO-3] Answer the following questions using the information below: Northern Star sells several products. Information of average revenue and costs is as follows: Selling price per unit $20.00 Variable costs per unit: Direct material $4.00 Direct manufacturing labor $1.60 Manufacturing overhead $0.40 Selling costs $2.00 Annual fixed costs $96,000 The company sells 12,000 units at the end of the year. If direct labor and direct material costs increase by $1 each, contribution margin O increases by $14,000 O decreases by $16,000 decreases by $14,000 O decrease by $24,000 O increases by $16,000 decreases b $20,000 Increases by $20,000 decreases by $18,000