6. If total revenue is $9000, total variable cost is $2000, then contribution margin will be

1.$11,000

2.$7000

3.$4,500

4.$7,000

7. If fixed cost is $30000, contribution margin percentage is 40%, then breakeven revenue will be

1.$120,000

2.$75,000

3.$12,000

4.$175,000

8. Variable cost per unit is multiplied to quantity of sold units to calculate

1.per unit cost

2.variable cost

3.fixed cost

4.multiple cost

Please provide the correct response