Mazoon Company sells 500 units resulting in $300,000 of sales revenue, $100,000 of variable costs, and $36,000 of fixed costs. Breakeven point in units is: a. 400 units O b. 600 units O c. 72 units O d. None of the given answers 90 units e. The contribution margin ratio is calculated as: a. Selling price per unit - the variable cost per unit O b. None of the given answers The selling price per unit ratio / variable cost per unit ratio d. (the selling price per unit/the selling price per unit) - variable cost ratio e. The selling price per unit /variable cost per unit C