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: $$19$ million per year$)$ $ $133$ million

Net loss$$AOCI at January $1,2024($previous losses exceeded previous gains$)$ $ $830$ million

Average remaining service life of the active employee group $10$ years

Actuary's discount rate $7\%$

$($$ in millions$)$

PBO Plan Assets

Beginning of $2024$ $ $2,100$ Beginning of $2024$ $ $1,900$

Service cost $95$ Return on plan assets, $8\%(10\%$ expected$)152$

Interest cost, $7\%147$

Loss $($gain$)$ on PBO $(29)$ Cash contributions $105$

Less: Retiree benefits $(68)$ Less: Retiree benefits $(68)$

End of $2024$ $ $2,245$ End of $2024$ $ $2,089$

Required:

$1-$a$.$ Determine Mahomes's pension expense for $2024.$

$1-$b$,2.$ to $4.$ Prepare the appropriate journal entries to record the pension expense, to record any $2024$ gains and losses, to record the cash contribution to plan assets and to record retiree benefits.