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

EXHIBIT 8-5 2019 AMT Exemptions Phase-Out Complete Filing Status Exemption Phase-Out Begins at This Level of AMTI 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