The McCollum Company amended its noncontributory defined benefit pension plan at the beginning of 2004. The unrecognized prior service cost related to this amendment amounts to $240,000. Information regarding the four participating employees is as follows:

Employee

Expected to Retire After

A

Year 1

B

Year 2

C

Year 4

D

Year 5

Using the straight line method, what is the amount of unrecognized prior service cost to be amortized in 2007?

a. $0

b. $40,000

c. $60,000

d. $80,000