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The following information pertains to Houston Corporations defined benefit pension plan At tive end of 2021 . Houtston coritibuted 5670 thouland to the pension fund and benefi payments of 5624 thourand wore mode to retirees. The expected ate of initir an phith asi.ts Was 90K, and the actuary's discount rate is 8%. There were no changes in actuariat estimates and assumptions regarding the peo What is the 2021 service cost for Houston's plan? Cannot be determined from the given information. $624 thousand. $504 thousand. $332 thousand