In 2010, Brown Dog Sold 20,000 Units of Its Product

In 2010, Brown Dog sold 20,000 units of its product at $50 per unit. The following information is also available:

What was Brown Dog's degree of operating leverage in 2010?

A) 1.44
B) 1.56
C) 1.64
D) 2.56
E) Cannot calculate from the information given