The following information pertains to Havana Corporation's defined benefit pension plan: ($ in thousands) Projected benefit obligation Plan assets Prior service cost-AOCI Net loss-AOCI 2021 Beginning balances $(6,700) 6,400 670 $ 790 2022 Beginning balances $(7,204) 7,036 640 $ 850 At the end of 2021, Havana contributed $730 thousand to the pension fund and benefit payments of $664 thousand were made to retirees. The expected rate of return on plan assets was 10%, and the actuary's discount rate is 8%. There were no changes in actuarial estimates and assumptions regarding the PBO. What is the 2021 service cost for Havana's plan? Multiple Choice O $300 thousand. $512 thousand. O $632 thousand