Problem 9.57 (Product mix with key factor). A company manufactures and markets three products. X, Y and Z. All the three products are made on the same set of machines. Production is limited by machine capacity. From the data given, indicate priorities for products X, Y and Z with a view to maximising profits : Products Y Z Raw material cost per unit (Rs.) 11.25 16.25 21.25 Direct labour cost per unit (Rs.) 2.50 2.50 2.50 Other variable cost per unit (Rs.) 1.50 2.25 3.55 Selling price per unit (Rs.) 25.00 30.00 35.00 Standard machine time required per unit in minutes 39 20 28