Should I take the AP Calculus AB Exam or not...?

Hi, I took Honors Calculus the first semester of this year and got a B-, I then talked with my guidance counselor and I went into the AP Calculus to prep for the AP exam and I do not get an actual grade in the cl. So I am now in AP Calc and not doing so well. I've have received a 72, 34, and 43 on the first 3 exams so far. There are 4 other Honors Calc kids that are taking this AP Calc cl with me and they are doing equally bad if not worse. I am just indecisive on whether I pay $87 to take the AP Calc Exam to end up getting a 1 or 2. Does anyone know how much money at most I would save if I was to p an AP Calc exam because if it isn't a big time cash saver then I might as well not take the AP exam. My friend is leaning towards not taking the AP exam as well. We both realize it makes this cl completely pointless if we do this but we have senioritis so it doesn't matter haha.