Hey! Need help with Requirement 2 and 3!

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The contribution margin income statement of Krazy Kustard Donuts for March 2008 follows: Krazy Kustard sell 2 explain donuts for every dozen custard filled donuts. A dozen plain donuts sells for $6, with a variable cost of f$2 per dozen. A dozen custard-filled donuts sells for $7, with a variable cost of $4.20 per dozen. Compute Krazy Kustard's margin of safety in dollars for March 2008(p.1058) If Krazy Kustard can increase monthly sales volume by 10%, what will operating income b? (The sales mix remains unchanged.)(p.1061)