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4 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 dat apply: Model X 150 Model Y $66 Model 2 Selling price Direct materiale 7 Direct labor ($12 per hour) 12 12 12 Variable support costs (16 per machine-hour) 6 Fixed support cete 10 10 10 Which model has the greatest contribution margin per machine-hour? Model X Model Y Model Z O Both Model X and Model Y have the highest and same contribution margin per machine-hour Aurum Appliances manufactures three sizes of kitchen appliances: small, medium, and large. Product information is provided below. Small Medium Large Unit selling pro $420 $610 $1240 Unit costs Variable manufacturing (260) (300) (510) Fixed manufacturing (60) (130) (20) Fixed selling and administrative (20) (115) (120) Unit profit $30 $65 $320 Demand in units 130 160 130 50 40 130 Machine-hours per unit The maximum machine-hours available are 6200 per week. Which of the three product models should be produced first if management incorporates a short-run profit maximizing strategy? small appliance medium appliance large appliance both medium and large appliance