I'm not ping pre-cal and I need at least a B?

I'm not ping pre Cal and I need at least a B for this program that I'm in at college. I'm in the sixties range for everything I've done. On the midterm I got a 69. Almost all the of the quizzes (which amount to one test grade i've gotten all sixties and fifties on). All thats left now is more quizzes and the final. I know its practically impossible but what the hell else of an option do I have?