Gallison Company's net profit under absorption costing was $15 000 higher than under variable costing. During the year, the company produced 20 000 units for total variable production costs of $80 000. If fixed manufacturing overhead was $40 000, how many units were sold?

A. 20 000 units

B. 12 500 units

C. 10 000 units

D. 7500 units