Mutually exclusive projects are projects where if you accept one project, the other project has to be rejected.
For example, a company has $250,000 to invest in a project. It can either choose to build a warehouse or buy an equipment. Both projects cost $250,000. Because of the limited capital, only one project can be chosen. This is an example of a mutually exclusive project
Michelle doesn't have to see $90 worth a movie a month, and she could mostly cut that one out, if not completely. She could also see if she is able to lower her internet and/or television bill by downgrading plans.