Shining Ltd manufactures four products using the same machinery. The following tables relates to the four products:

Product A Product B Product C Product D Cost per unit $ un Selling price 44 47 32 30 Direct materials 8 10 8 7 Direct labour 8 8 4 4 Variable overheads 6 w 3 Fixed overheads* 16 16 8 8 Profit 6 7 9 8 Labour hours 0.5 0.5 0.25 0.25 Machine hours 5 4 3 4 Maximum demand per week 100 250 180 200 Fixed costs are $8,000 per week