Penn Foster proctored final exam—Feedback?

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I wish I could have passed my final with a 33%! Who knows? I might have actually passed it. No, you can't pass the final with a 33%. Here's where I remind you that I'm mathematically challenged. (In other words: "Warning, Danger Ahead.) I think that you combine the lesson examination scores, average them, and take 67% of that number. Then, you take the final, and take 33% of THAT number. THEN you combine the two, and that's your final grade. Please, for the love of all that you hold holy, do NOT take my word as the final word. If my thinking is correct, it means that you MUST take the final as, even if you had a 100% average on your examininations, 67% of that would be a flunking score.

Again, please do NOT take my word for this.

That should be correct. What that should mean (also assuming PF allows you to fail the final):

Code:

Quiz Grades Avg     Final Grade Required to Pass Class
     70%                                70%
     80%                                50%
     90%                                30%
     100%                               10%