Tammy is the manager of a hotel. To be available in emergency situations, Tammy$$s employer requires that she live in one of the hotel rooms $($without charge$).$ The value of the room is $$1,500$ per month if occupied each night. The hotel is ordinarily $70\%$ occupied. If Tammy did not live there, she would live in an apartment that would rent for $$900$ per month. Tammy$$s inclusion in monthly gross income from living in the hotel room is:

Group of answer choices

$$0.$

$$900.$

$$1,350.$

$$1,500.$