As the Owner of a Bluetooth Specialties Store, Alicia Fountainbleau

As the owner of a Bluetooth specialties store, Alicia Fountainbleau has an income of $72,000. She pays $30,000 per year in taxes and another $22,000 per year in grocery bills, house mortgage, and car payment. Last year she spent an additional $4,000 on a two-week vacation at a Club Med in Rio de Janerio. What was Alicia's discretionary income last year?

A) $20,000.
B) $4,000.
C) $42,000.
D) $26,000.
E) $50,000.