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 Model Y Model Z $ 54 $ 65 $ 76 Selling price Direct materials Direct labor ($13 per hour) 13 26 13 Variable support costs ($7 per machine-hour) 14 14 15 Fixed support costs 15 15 If there is a machine breakdown, which model is the most profitable to produce? A. Model X OB. Model Y C. Model Z D. Both Model X and Model Y have same and highest profitability