2 The following information pertains to Havana Corporation's defined benefit pension plan: ($ in thousands) 2021 2022 Beginning Beginning balances balances Projected benefit obligation $ (6,000 ) $ (6,504 ) Plan assets Prior service cost-AOCI Net loss-AOCI 5,760 600 720 6,336 552 786 At the end of 2021, Havana contributed $696 thousand to the pension fund and benefit payments of $624 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? $528 thousand. $276 thousand. $648 thousand. Cannot be determined from the given information