Richard and Alice Kelley lived apart during 2009 and did not file a joint tax return for the year. Under the terms of the written separation agreement they signed on July 1, 2006, Richard was required to pay Alice $1,500 per month of which $600 was designated as child support. He made 12 such payments in 2009. Assuming that Alice has no other income, her tax return for 2009 should show gross income of:
a. $0
b. $5,400
c. $10,800
d. $12,600