2. Lorin Management Services has an unfunded postretirement benefit plan. On December 31, 2011, the following data were available concerning changes in the plan's accumulated postretirement benefit obligation with respect to one of Lorin's employees: APBO at the beginning of 2011 $ 40,000 Interest cost: ($40,000 10%) 4,000 Service cost: ($92,000 1/23) 4,000 Portion of EPBO attributed to 2011 APBO at the end of 2011 $ 48,000 What is the expected postretirement benefit obligation at the end of 2011