Ms. Maxine Davies and​ spouse, Mario​ Davies, have 2020 medical expenses totaling​ $4,350. While Ms. Davies has 2020 Net Income for Tax Purposes​ (NITP) of​ $150,000, Mario has no income during the year. They have 2 children. Their 12 year old​ daughter, Mandy, has 2020 medical expenses of​ $4,600 and no income. Their 21 year old​ son, Mark, has 2020 medical expenses of​ $8,425 and NITP of​ $8,240. Ms. Davies pays the medical expenses for both children. For maximum​ benefit, who should claim the medical expense tax credit for 2020 and how​ much?