Sanders Corporation sells products for $60 each that have variable costs of $40 per unit. Sanders's fixed cost is $300,000.

1) Unit contribution margin for Sanders Corporation =

2) Break-even volume in units for Sanders Corporation =

3) Break-even volume in dollars for Sanders Corporation =

4) Contribution margin ratio for Sanders Corporation =

5) If Sanders is currently selling 20,000 units, the margin of safety (calculated as a percentage of current level of sales) =