For Wickham Co, 2020 sales is $3,000,000 for a total of 20,000 units, fixed expenses are 5907,288, 28 FIS 4 per unit 5 Required: 1. Determine the contribution margin per unit and contribution margin ratio. Calculate Wickham's break-even point in units and in sales dollars for the year 2020. Show your detailed calculations. (5 marks). hat is the margin of safety in dollars and margin of safety % at the current sales level? Show your detailed work.(2