Tricky Homework

Oh man I was doing a practical set of one of my homework. It took me 2 full days to work on it and not even finish it. Man the difference of $2.50 was so tricky that I have to review every task that I did and I ended up doing it again almost at the very beginning. I have wasted my time. I should have did it from the start to correct the problem. I am sure there's a way how to do it but because of frustrations my head didn't get to think straight. Gush, this is part of being a student. My weekend was ruined.