I want to know answer for those three questions

Kemp sells a product for $20 per unit. The product's variable costs are $10 per unit. Fixed costs are $85,000. When 12,000 units are sold, profit is $35,000. How many units must be sold to break-even? O 4,250 O 20,400 8,500 10,000 10 15 Wells Company has a contribution margin of 40% and fixed costs of $250,000. What is the break- even point in sales dollars? O $625.000 O $250,000 O $375,000 O $100,000 15 15 A production manager's salary would be considered direct labor and prime cost manufacturing overhead and a conversion cost manufacturing overhead direct labor, a prime cost, and a conversion cost