Corbett's AMTI is $620,000. What is his AMT exemption under the following alternative circumstances?

b. He is married and files a separate return

Amount of AMT exemption=?

c. His filing status is single.

Amount of AMT exemption=?

d. His filing status is head of household.

Amount of AMT exemption=?

EXHIBIT 8-5 2019 AMT Exemptions

Filing Status	Exemption	Phase-Out Begins at This Level of AMTI	Phase-Out Complete for This Level of AMTI
Married filing jointly	$111,700	$1,020,600	$1,467,400
Married filing separately	55,850	510,300	733,700
Head of household and single	71,700	510,300	797,100