Well that depends on how many hours it takes, but yes four weeksa at 40 hours is 24K.
At my first fulltime job in the game industry, I was earning $22K a YEAR. :-) And my second fulltime job paid only $30K.
I don't know what kind of software you write, but for shareware games $150 an hour would be totally out of the question unless you're able to pump out a game a week.
Heck, even for a commercial game that's crazy. I think commercial game programmers are paid between $55-$120K. You must be developing very expensive apps for large highly profitable corporations with more dollars than sense. :-)