8) Springer Products 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: $50 Model Z $80 10 Model X Selling price Direct materials 10 Direct labor ($15 per hour) Variable support costs ($5 per machine-hour) 5 Fixed support costs 12 Model Y $66 10 15 10 12 15 12 Which model has the greatest contribution margin per unit? A) Model X B) Model Y C) Model Z D) Both Model X and Model Y have the highest and same contribution margin per unit