Ohn and Elaine, ages 29 and 28, are married and file a joint return. In addition to having TWO dependent children (Jacqueline and Jesse), John and Elaine have adjusted gross income ("AGI") of $90,000 and itemized deductions of $15,000. What is their taxable income for 2013?
a. $59,400
b. $63,300
c. $75,000
d. $90,000