please help me with the last three questions

Assume that Corn Co. sold 7,700 units of Product A and 2,300 units of Product during the past year. The unit contribution margins for Products A and B are $30 and 562, respectively. Com has fixed costs of $336,000. The break even point in units is a. 10,792 units b.7.195 15:490 und d. 8,994 units when Isaiah Company has fixed costs of $86,200 and the contribution margin is $20, the break-even point is a. 4.110 i b. 13.00 c. 620 d. 5.100 Zeke Company sells 23,500 units at $16 per unit. Variable costs are $7 per unit, and fixed costs are $35,000. The contribution margin ratio and the unit contribution margin, respectively, are a. 36% and 59 per unit b. 36 S16 per unit GC 19 and 516 per unit Cd. 15 and 57 per unit