1 Ralph's Mufflers 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 a. For each model, compute the contribution margin per unt b. For each model, compute the contribution margin per machine-hour c. If there is excess capacity, which model is the most profitable to produce? Why? d. It there is constrained capacity, which model is the most profitable to produce? Why? b The contribution margin per machine-hour is Show your calculations: \begin{tabular}{|l|l|l|} \hline Model X Model Y & Model Z \\ \hline & & \\ \hline \end{tabular} c d John's 5-yeat-old Geo Prizm requires repairs estimated at $2,900 to make it road worthy again. His friend Julie suggested that he buy a 5-year-old used Honda Civic instead for $3,000 cash. Julie estimated the following costs for the two cars: 1 Ralph's Mufflers 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 a. For each model, compute the contribution margin per unt b. For each model, compute the contribution margin per machine-hour c. If there is excess capacity, which model is the most profitable to produce? Why? d. It there is constrained capacity, which model is the most profitable to produce? Why? b The contribution margin per machine-hour is Show your calculations: \begin{tabular}{|l|l|l|} \hline Model X Model Y & Model Z \\ \hline & & \\ \hline \end{tabular} c d John's 5-yeat-old Geo Prizm requires repairs estimated at $2,900 to make it road worthy again. His friend Julie suggested that he buy a 5-year-old used Honda Civic instead for $3,000 cash. Julie estimated the following costs for the two cars