Saul Lawson has a spouse, a 20 year old dependent son, and a 12 year old daughter. His 2021 Net Income For Tax Purposes is $70,000. Medical expenses for Saul, his spouse, and his 12 year old daughter total $4,500. He also pays medical expenses for his son of $6,200. His spouse has Net Income For Tax Purposes of $10,000 and his son has Net Income For Tax Purposes of $9,200. 

Determine Saul's medical expense tax credit for 2021. (Please show your calculation)