Can someone please answer the 3 questions and show ALL the work please. Thanks

A cement manufacturer has supplied the following data: 220.000 Tons of cement produced and sold $924,000 $297,000 Variable manufacturing expense... Fixed manufacturing expense $280,000 $165.000 Variable selling and administrative expense Fixed selling and administrative expense. $82.000 Net operating income $100,000 11. What is the companys unit contribution margin? A. $4.20 per unit B, S0.45 per unit C. $1.90 per unit D. $2.10 per unit 12. The company's contribution margin ratio is closest to: A. 40.0% B. 50.0% C. 60.0% D. 10.7% 13. If the company increases its unit sales volume by 5% without increasing its fixed expenses, then total net operating income should be closest to: A. $5,000 B. $123,100 C. $105,000 D. $102,500