The following incomplete (columns have missing amounts) pension spreadsheet is for Old Tucson Corporation (OTC). Plan Assets Prior Service Cost Net (Gain) Loss 70 Pension Expense Net Pension (Liability)/Asset Cash PBO (540) 74 (27) ($ in millions) debit (Credit) Beginning balance Service cost Interest cost Expected return on assets Gain/loss on assets Amortization of: Prior service cost Net gain/ loss Loss on PBO Contributions to fund Retiree benefits paid Ending balance (3) (10) (29) 29 (68) 51 (51) 312 (621) 66 (310) What was the prior service cost at the beginning of the year? Multiple Choice $66 million. O $69 million. $69 million. $6 million $56 million. $76 million