I absolutely agree with Anonymous2007 — it is possible to still get a study score of 30 or 40. Naturally, your exam is worth a lot more than your SACs, but remember it is your SAC rank that matters most (and in turn the strength of your class) rather than your actual SAC scores. You can read all about SAC ranks here.
Good luck with your study. Again, it's still early in the year so you have many more SACs and the exam to go.