(a) Briefly explain the concept of limiting factors in operations and give an example

(b) Explain what the contribution margin per limiting factor is and how it is measured

(c) A company manufactures and sells two products (X and Y) both of which utilise the same skilled labour. For the coming period, the supply of skilled labour is limited to 2,000 hours. Data relating to each product are as follows: Product X Y Selling price per unit $20 $40 Variable cost per unit $12 $30 Skilled labour hours per unit 2 4 Maximum demand (units) per period 800 400 In order to maximise profit in the coming period, how many units of each product?