Sales$$3,000,000$Less variable expenses$1,800,000$Contribution margin$1,200,000$Less fixed expenses$500,000$Net income$$700,000$The company has no beginning or ending inventories and produced and sold $20,000$ units during the month.Required:a$.$ What is the company's contribution margin ratio?b$.$ What is the company's break$-$even in units?c$.$ If sales increase by $100$ units, by how much should net income increase?d$.$ How many units would the company have to sell to attain target profits of $$125,000?$e$.$ What is the company's margin of safety in dollars?f$.$ What is the company's degree of operating leverage?$$