Angela is considering moving from her current residence to a larger apartment. She works from home, and her current apartment has noisy neighbors, making it difficult to concentrate. In addition, the new apartment is located in a more affluent area of town but managed by a friend who can give Angela a break on the rent. Angela's current rent is $$900$ per month, and she has two months remaining on her lease. Whether she continues to live there or not, she will have to pay the last two months of rent. The new, larger apartment normally rents for $$1,000$ per month, but Angela can rent it for $$600$ per month plus utilities, which should average $$150$ per month. Because the new apartment is larger, if Angela moves, she will need to buy additional furniture. She knows a great place to get some good quality, "gently used" furniture for a reasonable price.

Which of the following is irrelevant to Angela's decision to stay in the old apartment or move to the new one?

a$.$ Rent of $$600$ per month for the new apartment

b$.$ The cost of the used furniture

c$.$ Utilities for the new apartment of $$150$ per month

d$.$ The last two months of rent in the apartment

e$.$ The noisy neighbors