On what do you usually spend the extra money that you have earned?

I usually spend my extra money online on my expense of electricity. When I have a job in real life, I often spend my extra money on inviting friends to dinner in a restaurant or buying a beautiful skirt for myself or seeing a film in the theater with my bf. But now I lost my job, and I have to earn more and more money online to pay for the expense of my living. Wish I can earn enough money online.

or surplus money can mean money that was earned from your usual income source, but was how much you have left after paying bills etc. i usually spend my surplus/extra money on books and movie rentals. sometimes i will buy a new videogame too. but mostly books lol!