The following information pertains to Havana Corporation's defined benefit pension plan: 2022 2021 Beginning balances $(6,200) 5,960 620 $ 740 ($ in thousands) Projected benefit obligation Plan assets Prior service cost-AOCI Net loss-AOCI Beginning balances $(6,704) 6,536 560 $ 806 6 15 At the end of 2021, Havana contributed $665 thousand to the pension fund and benefit payments of $614 thousand 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