During the year just ended, Kerry Company's income under absorption costing was $3,000 lower than its income under variable costing. The company sold 9,000 units during the year, and its variable costs were $9 per unit, of which $3 was variable selling expense. If production cost is $11 per unit under absorption costing every year, then how many units did the company produce during the year? a. 8,000. b. 10,000. c. 9,600. d. 8,400. Need calculations with