Gorky$-$Park Corporation provides postretirement health care benefits to employees who provide at least $10$ years of service and reach age $60$ while in service. On January $1,2024,$ the following plan$-$related data were available:

$($$ in millions$)$

Accumulated postretirement benefit obligation $ $140$

Fair value of plan assets None

Average remaining service period to retirement $25$ years $($same in previous $10$ years$)$

Average remaining service period to full eligibility $20$ years $($same in previous $10$ years$)$

On January $1,2024,$ Gorky$-$Park amends the plan to provide certain dental benefits in addition to previously provided medical benefits. The actuary determines that the cost of making the amendment retroactive increases the APBO by $$20$ million. Management chooses to amortize the prior service cost on a straight$-$line basis. The service cost for $2024$ is $$43$ million. The interest rate is $8\%.$

Required:

$1.$Calculate the postretirement benefit expense for $2024.$

$2.$ Prepare the journal entry to record the expense.