On January 1, 2024, Tom's Transport Company's accumulated postretirement benefit obligation was $40,000,000. At the end of 2024, retiree benefits paid were $4,500,000. Service cost for 2024 is $7,000,000. At the end of 2021, there was no prior service cost or net gain or loss. Assumptions regarding the trend of future health care costs were revised at the end of 2024. This revision caused the actuary to revise downward the estimate of the APBO by $600,000. The appropriate discount rate was 7%. Required: Determine the amount of the accumulated postretirement benefit obligation on December 31, 2024. Note: Amounts to be deducted should be indicated with a minus sign. Postretirement Benefit Obligation January 1, 2024, balance in APBO December 31, 2024, balance in APBO $ 0