This year, Roberts Company's income under absorption costing was P2,000 lower than its income under variable costing. The company sold 8,000 units during the year, and its variable costs were P8 per unit, of which P2 was variable selling expense. If production cost was P10 per unit under absorption costing, then how many units did the company produce during the year?

A. 7,500 units

B. 8,500 units

C. 7,000 units

D. 9,000 units