Canceling a AP test

<p>I signed up for AP Physics B and 5 other tests (I know, not very wise) but I don't feel very prepared for physics at all. Is there anyway to cancel it now?</p>

<p>just cancel! you get most of your money back ($75 for my school). i did it for stats today.</p>

<p>do I tell them on the spot?</p>