The following facts relate to the postretirement benefits plan of Ivanhoe, Inc. for 2018:

Service cost$790000

Discount rate8%

APBO, January 1, 2018$4090000

EPBO, January 1, 2018$4900000

Average remaining service to full eligibility20 years

Average remaining service to expected retirement25 years

The amount of postretirement expense for 2018 is

a)$1182000.

b)$1117200.

c)$1321700.

d)$1280800.