Answer:
1. The expected post-retirement benefit obligation at the end of 2021 is $196,000, the present value of total net costs of providing health care benefits.
2. Calculation of the accumulated post-retirement benefit obligation at the end of 2021 is as below:
APBO = EPBO * Full eligibility period / Attribution period
APBO = $196,000 * 2 / (2+28)
APBO = $196,000 * 2/30
APBO = $13066.66666666667
APBO = $13,066.67
Thus, accumulated post-retirement benefit obligation at the end of 2021 is $13,066.67.