The defined-benefit pension plan of Best Value Transport included the following balance at January 1, 2021 (S in millions): $830 $760 Projected benefit obligation at January 1, 2021 Plan assets at fair value at January 1, 2021 Prior service cost---AOCI at January 1, 2021 Net gain ---AOCI $50 $113 Information regarding the defined benefit pension plan of Best Value Transport included the following for 2021 (S in millions): Service cost $55 Interest cost $18 Gain from change in actuarial estimates in PBO $10 Retiree benefits paid (end of year) $59 Actual return on plan assets $28 $32 Expected return on plan assets Employer's cash contribution (end of year) 582 Amortization of prior service costs---AOCI SS Amortization of net gain --AOCI S3 What is the amount of pension expense for year 2021? Do not add dollar sign; do not add comma by yourself to your mout round the answer to the whole momber: enter your answer millions