Need help on a Tiffanys on A and B.

Walt and Deloris, who file a joint return, have two dependent children, Bill and Tiffany. Bill is a freshman at State University, and Tiffany is working on her graduate degree. The couple paid qualified expenses of $2.400 for Bill (who is a half-time student) and $7,500 for Tiffany a. What education tax credits are available if Walt and Deloris report modified AGI of $123.300? b. What education tax credits are available if Walt and Deloris report modified AGl of $123,300 and Tiffany is taking one class a semester (is less than a half-time student) and not taking classes in a degree program? (Do not round intermediate calculations. Round your final answers to the nearest whole dollar amount.)