3 30 pts Superior, Inc. sponsors a Defined Benefit Plan for its employees. On January 1, 2021, the balances related to the plan are as follows: = - PBO 1,000; Plan Assets = 900; OCI - Prior Service Cost = 50; OCI - Gain/Loss = 0; Cash balance = 3,000 As a result of the operation of the plan during 2021, the actuary provided the following additional data at December 31, 2021: Service Cost 100 Benefits paid to retirees Actual return on plan 85 Settlement rate assets Amortization of PSC 15 Expected rate of return on plan assets Contributions in 2021 60 45 6% 9% 4 years Average service years remaining for active employees REQUIRED: Fill in the blanks below. You may find it easier to answer the following questions by first completing a pension worksheet. PBO has a balance of $ at the end of 2021