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: Model X Model Y Model Z Selling price $55 $69 $78 Direct materials 10 10 10 Direct labor ($15 per hour) 15 15 30 17 14 114 14 Fixed support costs 11 11 11 Variable support costs Market demand for X is 500 units; y, 200 units and Z, 300 units. If there is only 1000 labor hours per week, which product mix is the most profitable to produce?