Last month, Laredo Company sold 450 units for $25 each. During the month, fixed costs were $2, 520 and variable costs were $9 per unit. Determine the unit contribution margin and contribution margin ratio. Calculate the break-even point in units and sales dollars. (Round your answers to the nearest whole number.) Compute Laredo's margin of safety in units and as a percentage of sales. (Round your intermediate calculations to the nearest whole number. Round your final percentage of sales answers to 4 decimal places, (i.e. 0.123456 should be entered as 12.3456.))