The contribution margin income statement of Delectable Donuts for August 2024 follows: (Click the icon to view the contribution margin income statement.) Delectable sells five dozen plain donuts for every dozen custard-filled donuts. A dozen plain donuts sells for $4.00, with total variable cost of $1.60 per dozen. A dozen custard-filled donuts sells for $7.00, with total variable cost of $2.80 per dozen. Read the requirements. operating income Requirement 5. Prove your answer to Requirement 4 by preparing a contribution margin income statement with a 20% increase in total sales. (The sales mix remains unchanged.) Delectable Donuts Contribution Margin Income Statement Month Ended August 31, 2024 Net Sales Revenue Variable Costs Contribution Margin Fixed Costs Operating Income places