Answer:
The $125 income from the new job - relevant (A)
The $40 income from the library - irrelevant (B)
The $50 nonrefundable registration fee Isabella paid for the basket-weaving class - irrelevant (C)
The $15 cost for gas - relevant (D)
The $75 per month that Isabella spends for clothing and The time Isabella spends volunteering at the animal sanctuary. - Irrelevant (E)
Step-by-step explanation:
(A) the income from the new job is relevant. It is the wages she will receive per week
(B) the library is irrelevant as it would not have to leave this job
(C) that is a sunk cost. Is irrelevant for the decision making
(D) the gas is a variable cost related to the job offer. It is relevant
(E) the consumer preferences are not relevant for their decision on the job offer. Also their volunteering is irrelevant. Is not related to the job