Question 10 1.5 points Dynondo's Brakes manufactures three different product lines, Model X Model Y, and Model Z. Considerable market demand exists for all models. The following per unit data apply: Model X Modely Model Z Selling price $66 379 Direct materiale 7 2 7 Direct laber($12 per hour) 12 12 24 Variable support costo (per machine-hour) 6 12 12 Fixed support 10 10 10 Which model has the greatest contribution margin per machine-hour? Model X Model Y Model Z Both Model X and Model Y have the highest and same contribution margin per machine-hour