Sandhill Corporation provides the following information about its defined benefit pension plan for the year 2023: Current service cost $225,950 Contribution to the plan 263,400 Past service cost, effective December 31, 2023 25,950 Actual return on plan assets 159,150 Benefits paid 102,700 Net defined benefit liability at January 1, 2023 426,500 Plan assets at January 1, 2023 1,591,500 Defined benefit obligation at January 1, 2023 2,018,000