Consider the following information for Leaves Inc. for the current year: Contribution margin ratio 30% Unit variable cost $13 Fixed costs $35,500 Sales for the previous year $90,200 What would be the effect on operating income if sales for the current year increased by 10%? a. Operating income would increase by $27,983. b. Operating income would decrease by $27,060. c. Operating income would increase by $2,706. d. Operating income would decrease by $2,907