Oslo Company prepared the following contribution format income statement based on a sales volume of 1,000 units (the relevant range of production is 500 units to 1,500 units):

Sales	$	25,000
Variable expenses		17,500
Contribution margin		7,500
Fixed expenses		4,200
Net operating income	$	3,300

1. What is the contribution margin per unit? 2. What is the contribution margin ratio? 3. What is the variable expense ratio? 4. Break-even point in unit sales? 5. Break-even point in dollar sales? 6. How many units must be sold to achieve a target profit of $4,500? 7. What is the margin of safety in dollars? What is the margin of safety percentage?