The eontbution margin inoome statement of Trepani Donuts for August 2024 follow: Ifit (Click the icon lo view the contrbution margen income stabement) Trepani sels five doren plain donuts for every two dozen custard-fllod donuts. A dozan plain donuts sefs for $400. with lotal variable ecst of $1.80 per dozen. A dozen castand-fled donuts sels for $6.80. with fotal variable cost of $3.06 per dozen. Read the recuivements Data table Requirements 1. Calculate the weighted-average contribution margiff. 2. Determine Trepani's monthly breakeven point in dozens of plain donuts and custard-filled donuts. Prove your answer by preparing a summary contribution margin income statement at the breakeven level of sales. Show only two categories of costs: variable and fixed. 3. Compute Trepani's margin of safety in dollars for August 2024. 4. Compute the degree of operating leverage for Trepani Donuts. Estimate the new operating income if total sales increase by 20%. (Round the degree of operating leverage to four decimal places and the final answer to the nearest dollar. Assume the sales mix remains unchanged.) 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.)