Net Income Planning Nolden Company has charged a selling price of $20 per unit, incurred variable costs of $10 per unit, and total fixed costs of $105,000. What unit sales volume is necessary to earn the following related amounts of net income before income tax? (a) $18,000; (b) $27,000; or (c) equal to 20% of sales revenue.

(a) Answer units

(b) Answer units

(c) Answer units