Last month, Laredo Company sold 540 units for $70 each. During the month, fixed costs were $4,704 and variable costs were $42 per unit: Required: 1. Detarmine the unit contribution margin and contribution margin ratio. 2. Calculate the break-even point in units and sales dollors. 3. Compute Laredo's margin of safety in units and as a percentage of sales. Determine the unit contribution margin and contribution margin ratio. Calculate the break-even point in units and sales dollars. Note: Round your answers to the nearest whole number Compute Laredo's margin of safety in units and as a percentage of sales. Note: Round your intermadiate caleulations to the neareat whole number. Round your percentage answer to 4 decimal places. (t.e, 0,123456 should be entered as 12.3456% )