On January 1,2018 obligation (APBO) was $2833. During 2018 the following relate to ABC's post-retirement medical plan: , ABC's accumulated post-retirement benefit retiree benefits paid were $292 . service cost was $537 assumptions regarding the trend of future health care costs were revised at the end of 2018, causing the actuary to revise the estimate of the APBO by $34 (positive number is increase in APBO and negative number is decrease) . actuary's discount rate is 8%. On December 31, 2018 ABC's APBO is