Last month, Laredo Company sold 520 units for $60 each. During the month, fixed costs were $8,211 and variable costs were $9 per unit. Required: 1. Determine the unit contribution margin and contribution margin ratio. 2. Calculate the break-even point in units and sales dollars. 3. Compute Laredo's margin of safety in units and as a percentage of sales. Complete this question by entering your answers in the tabs below. Determine the unit contribution margin and contribution margin ratio. Complete this question by entering your answers in the tabs below. 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 intermediate calculations to the nearest whole number. Round your percentage answer to 4 decimal places. (i.e. 0.123456 should be entered as 12.3456% )