The defined-benefit pension plan of Best Value Transport included the following balance at January 1, 2021 (S in millions): $650 $580 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 $20 $105 Information regarding the defined benefit pension plan of Best Value Transport included the following for 2021 (S in millions): Service cost $40 Interest cost $10 Gain from change in actuarial estimates in PBO S8 Retiree benefits paid (end of year) $48 Actual return on plan assets SIS $21 $62 Expected return on plan assets Employer's cash contribution (end of year) Amortization of prior service costs. AOCI Amortization of net gain ---AOCI $2 $4 What is the balance of net gain AOCI at December 31, 2021 Do not add dollar sign do not add conima by yourself to your mouround the arter to the whole number ter jour a million)