Should I quit or stick to it?

I've been recently contemplating about dropping my class Programming Language Theory. Why is because it's taking up too much of my time (at least 12 hours per week) in sacrifice of my time in work and things I would like to pursue.

Why should I stick?
+ I don't want to overload myself in my final year nor extend for one more semester.
+ I just need to PASS, that's it!
+ Class is mapped to a pretty-demanding mod in NUS, hence my results will not be screwed.
+ There's only 6 more weeks.

Why should I quit?
- It's taking up way too much of my time which leaves me with little to do what I like.
- I am not confident of passing, and if I fail, my in heavily in debt!
- It's a post-grad class and I did not even take the pre-req or its equivalent.


What should I do?