:The variable cost ratio is calculated as contribution margin ratio - (the selling price per unit/the selling price per unit) a O None of the given answers bO Selling price per unit - the variable cost per unit co The selling price per unit/variable cost per unit do The selling price per unit ratio/variable cost per unit ratio e o Mazoon Company sells 500 units resulting in $300,000 of sales revenue, $100,000 of variable costs, and $36,000 of :fixed costs. The number of units that must be sold to achieve $40,000 of operating income is units 190 .a O units 100 bo None of the given answers units 152 .d O units 180.eo