The following incomplete (columns have missing amounts) pension spreadsheet is for Old Tucson Corporation (OTC). Prior service Plan Net (Gain) loss 88 Pension Expenses Net Pension (Liability)/ Asset assets cost Cash PBO (600) 92 (33) (7.00) ($ 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 Contribution to funds Retiree benefits paid Ending balance (16) (35) 35 (86) 63 (63) (690) 346 84 108 (344) What was the balance of the net pension asset/liability reported in the balance sheet at the end of the previous year