Limiting factors: The following table relates to three products: Alpha, Beta and Charlie (information per unit) Alpha Beta Charlie f Selling price 15 10 20 Marginal cost 10 6 10 There are 1,000kg of material X in total. Alpha requires 1kg per unit, Beta requires 6kg per unit and Charlie requires 5kg per unit. Customer demand for the products are as follows: 600 units of Alpha, 400 units of Beta and 800 units of Charlie. What is the ranking of these products? 1st Beta, 2nd Alpha and 3rd Charlie 1st Charlie, 2nd Alpha and 3rd Beta 1st Alpha, 2nd Charlie and 3rd Beta 1st Beta, 2nd Charlie and 3rd Alpha