On December $31,2019,$ Robey Company accumulated the following information for $2019$ in regard to its defined benefit pension plan:Service costInterest cost on projected benefit obligationExpected return on plan assetsAmortization of prior service cost$$113,39011,81011,2502,130$On its December $31,2018,$ balance sheet, Robey had reported an accrued$/$prepaid pension cost liability of $$14,100$