Dave Collins and Christie Collins have two children, Ron, age 10, and Biki, age 21. The medical expenses and net income for each member of the family for 2021 is as follows:

Medical expense

Net income Dave $ 2,000 $100,000

Christie 3,000 40,000

Ron 600 500

Biki 12,000 9,000

All of the medical expenses were paid by Aras in the 12-month period ending December 31.

Determine the maximum medical expense credit for 2021