On January 1, 2024, Medical Tansport Company's accumulated postretirement berefit obligation was $25 milion. At me end of 2024 retiree benefits pald were $7 million. Service cost for 2024 is $3 million. Assumptions regarding the trend of future health care costs were revisct at the end of 2024 , causing the actuary to revise downward the estimate of the APBO by $2 million. The actuary's discount rate is 89 . Determine the amount of the accumulated postretirement benefit obligation at December 31,2024. Note: Enser your answer in millions (i.e., 10,000,000 should be entered as 10)