<p>Well, it works like this. You have about three hours to take whatever tests you are taking. Say from 8am to 11am. You can either a) take the SATI, which is a three hour test or b) take from one to three SAT II tests. </p>
<p>You cannot take two SAT I's or an SAT II AND the SAT I, at least on the same day.</p>
<p>How funny, I was just at that page looking for the answer to that same question. There's a $19 charge for changing a test that you already signed up for. </p>
<p>So let's say you signed up for just the SATII math, that would add up to $25 for the $17 registration fee and the $8 math test. If you want to change it to the SAT I, they'd charge you $19, take away the $25 for the subject test, then add the $30 for the regular SAT. So you'd actually be paying $49 for the regular test. </p>
<p>Stupid me, after registering to take writing and math, I realized the college I'm shooting for doesn't put much emphasis on the SAT I, let alone the subject tests. I'm wondering if I should just take those two tests, that at this point don't really seem to matter, or shell out the $49 to take the stupid SAT I. $19 is a lot of money.</p>
<p>I hope that's the answer you were looking for.</p>