In 2010, Edmonton Corporation Sold 10,000 Paperweights

In 2010, Edmonton Corporation sold 10,000 paperweights. Selling price was $60 per unit; variable costs were $20 per unit; and fixed costs for the year were $250,000. Contribution margin per paperweight was

A) $15.
B) $35.
C) none of the above
D) $20.
E) $40.