9. Contribution margin per unit is multiplied to number of units sold to calculate

1.revenue margin

2.variable margin

3.contribution margin

4.divisor margin

10. If variable cost is $50000 and fixed cost is $30000, then operating income would be

1.$80,000

2.$160,000

3.$16,000

4.$20,000

11. Contribution margin per unit is $500 per unit and breakeven per unit is $35, then fixed cost would be

1.$13,500

2.$14,280

3.$18,500

4.$17,500

12. Contribution per unit is $1200 and number of units sold is $80, then contribution margin would be

1.$9,650

2.$96,000

3.$15

4.$9,600

Please provide the workings and response for each