Use the Information Below to Answer the Following Question(s)

Use the information below to answer the following question(s) .Jill Bishop makes homemade soap.She sells it for $100 a case.Her variable costs are $40 per case.She has fixed costs of $600.
-What is the contribution margin per case?

A) $100.00
B) $60.00
C) $40.00
D) $15.00
E) $10.00