Actuary and trustee reports indicate the following changes in the PBO and plan assets of Mahomes Industries during $2024$:

Prior service cost at January $1,2024,$ from plan amendment at the beginning of $2021($amortization: $$6$ million per year$)$

Net loss$-$AOCI at January $1,2024($previous losses exceeded previous gains$)$

Average remaining service life of the active employee group

Actuary's discount rate

$$42$ million

$$180$ million

$10$ years

$7\%$

$\backslash$table$[[\backslash$table$[[$ in millions$)],[$PBO$]],,$Plan Assets,$],[$Beginning of $2024,$$$800,$Beginning of $2024,$$$600$