a) The Winston Plc produces and sells a single product known as Product Kye. The following information is available concerning Product Kye is given below: Product Kye BWP Selling price 90.00 Variable manufacturing costs 55.00 Variable Selling and administration costs 15.00 Number of units produced and sold during the period 3,500 Required: Using the information provided by Winston Plc, calculate Contribution per unit, total contribution and contribution margin ratio of product kye.