Which is not a part of your budget?

Question

Primary job gross income
Second job realized income
Fixed expenses
Discretionary expenses**** my answer
Am I correct?

Answer 1

You are correct : )
As the others are all things that occur in your year on a regular basis and must be considered when deciding how to best spend your money. The discretionary expenses could be things like going out to StarBucks everyday (it may be nice, but will eat up a lot of your money). The money spent on StarBucks coffee everyday could be put towards new tires for your car to drive you to your job.