please help with 10-12

Exercise 10 Indi Co. had sales per unit of $125 and a contribution margin ratio of 0.6 -Its fixed costs total $30000 and it wants to earn a target net income (TNI) of $15000 after taxes (assume a tax rate of 25%). Calculate the following: Break-even point in sales Pre-tax net income Exercise 11 Joel Co. had sales per unit of $12 and a variable costs per unit of $6. Its fixed costs total $2250 and it wants to earn a target net income (TNI) of $9000 after taxes. Assuming a tax rate of 25%, calculate the following: Sales required for TNI in $) Exercise 12 Todd Co. sells its product for $60 per unit. It has a contribution margin ratio of 0.3 and its fixed costs total $9000. If Todd Co. wants to earn a pre-tax net income of $18000 how many units must be sold (assume a tax rate of 25%)