The following incomplete (columns have missing amounts) pension spreadsheet is for Old Tucson Corporation (OTC).

The following incomplete (columns have missing amounts) pension spreadsheet is for Old Tucson Corporation (OTC) Prior Net $ in millions) debit (credit) Beginning balance Service cost nterest cost Plan Service (Gain) Pension Net Pension PBO AssetsCost Loss Expense Cash (Liability)/Asset (500) 58 62 Expected return on assets Gain/loss on assets Amortization of (23) Prior service cost Net gain/loss Loss on PBO Contributions to fund Retiree benefits paid Ending balance (25) 25 (56) 43(43) (574) 28854 78 What was the prior service cost at the beginning of the year? O $48 $54 $56 O s60