6 A company manufactures three products, the details of which are given below. Product Selling price [Total: 8] All figures in R DRZ650 XR400 F800 190 230 250 Cost per unit: Direct materials (R10 per kg) 20 10 30 Direct labour (R15 per hour) 75 60 90 Variable overheads 16 24 20 Fixed overheads 48 72 60 Required: If direct labour hours are in short supply, calculate the most profitable and least profitable use of the direct labour hours