Mars Inc. has a defined benefit pension plan. On December 31 (the end of the fiscal year), the company received the PBO report from the actuary. The following information was included in the report: ending PBO, $112,000; benefits paid to retirees, $12,000; interest cost, $8,300. The discount rate applied by the actuary was 10%. What was the beginning PBO?

$103,700. $83,000. $100,000. $108,300.