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Trey has two dependents, his daughters, ages $14$ and $18,$ at year$-$end. Trey files a joint return with his spouse.

What amount of child tax credit $($either as a child or a qualifying dependent$)$ will Trey be able to claim in $2023$ for his daughters under each of the following alternative situations? Use Exhibit $8-8.$

His AGI is $$421,400,$ and his daughters are ages $10$ and $12.$

Answer is complete but not entirely correct.

Amount of child tax credit

EXHIBIT $8-8$ Child Tax Credit Phase$-$Out Threshold

$\backslash$table$[[$Filing Status,Phase$-$Out Threshold$],[$Married filing jointly,$$400,000$