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 $(7,900) 7,600 790 $ 910 2022 Beginning balances $(8,484) 8,236 730 $ 980 At the end of 2021. Havana contributed $742 thousand to the pension fund and benefit payments of $784 thousled were made to retirees. The expected rate of return on plan assets was 10%, and the actuary's discount rate is 7%. There were no changes in actuarial estimates and assumptions regarding the PBO. What is the 2021 service cost for Havana's plan? Multiple Choice $615 thousand. Cannot be determined from the given information. $428 thousand $735 thousand