Clay Corporation Manufactures Two Styles of Lamps-A Bedford Lamp and a Lowell

Clay Corporation manufactures two styles of lamps-a Bedford Lamp and a Lowell Lamp.The following per unit data are available: Total fixed costs are $30,000,and Clay can sell a maximum of 10,000 units of each style of lamp annually.Machine hour capacity is 25,000 hours per year.
-What is the contribution margin per machine hour for the Lowell lamp?

A) $4 per machine hour
B) $2 per machine hour
C) $3 per machine hour
D) $12 per machine hour