If you're able to estimate that you'd use 2.81GB a month doing this, why would you ever elect to have a 300MB plan. You can get 30GB for $30.00 a month, which would keep your annual cost around $360.00 a year excluding taxes and other fees - same as the unlimited plan. People either lack common sense, or someone was trying really hard to troll this morning.

When I was in college (2002-2007), I was working nearly full time to pay for things my parents couldn't (books, supplies, etc).

I was offered three IT internships while I was in school:

A wireless telecommunications company paid me over 17.00 an hour.
A cosmetic company offered to pay me 12.00 an hour.
A shipping company paid me 20.00 an hour.

The shipping company offered to take me on full time as an employee, but didn't pay me much more than what I was earning as an intern, plus I really didn't like the direction I was headed there.

After that I managed to find employment that offered me a better career path, and better compensation. So another piece of "advice", don't always take your first offer, unless you have to.