Pension Accounting

[andrei2209]

Thanks for the reply Muhammad!
I actually don't have problems calculating the accrued obligation or the pension plan assets. This is what I have
ABO
Beginning (plugged) 827,273
Accrued interest 45,500
Current service cost 40,000
Benefits paid (37,750)
Actuarial loss(plugged) 10,477
Ending balance 885,500

Plan assets
Begging(plugged) 412,000
Expected returns 18,540
Experience loss (2,060)
Contributions 72,000
Benefits paid (37,750)
Ending balance 462,730

Now if I try to reconcile the beginning balances I have
ABO 827,273
PPA (412,000)
Pension account (200,000)
So I have a 215,273 unrecognized liability, and this should reconcile with an unamortized plan amendment( I assume there is one) plus other unrecognized amounts from previous experience gains/losses and actuarial revaluation(called here actuarial gains/losses).
And this is where my problem is. If I would know what the unamortized plan amendment or the actuarial gains/losses were at the beginning of the period it would be easy.
Is there any way I can find that with the given information?

Thank you again!