Please show calculations. Thanks : $)$

Nash Corp. has the following beginning$-$of$-$the$-$year present values for its projected benefit obligation and market$-$related values for

its pension plan assets.

The average remaining service life per employee in $2019$ and $2020$ is $10$ years and in $2021$ and $2022$ is $12$ years. The net gain or loss

that occurred during each year is as follows: $2019,$$$338,800$ loss; $2020,$$$108,900$ loss; $2021,$$$13,310$ loss; and $2022,$$$30,250$ gain.

$($In working the solution, the gains and losses must be aggregated to arrive at year$-$end balances.$)$

Using the corridor approach, compute the amount of net gain or loss amortized and charged to pension expense in each of the four

years, setting up an appropriate schedule.