I make $2000 a month
I owe $1000 in rent, $500 for gas and utilities, and $250/month for groceries.
I WANT 2 concert ticket that cost $150 each, but I need $250 to repair my car.
I would use my remaining money to repair my car so I can get to and from where I need to go.
Rent, utilities, and gas are all fixed expenses