Roger Is Required Under a 2004 Divorce Decree to Pay

Roger is required under a 2004 divorce decree to pay $200 of alimony and $500 of child support per month for 12 years. In addition, Roger makes a voluntary payment of $100 per month. How much of the total monthly payment is deductible by Roger?

A) $0
B) $200
C) $500
D) $600
E) None of the above