Paper for Work, Paper for Succes

There was my book when I studied at school, there was too much number which have to solved the problem.
Mr. Singgih had me to did all the task, my friends did it do but I think it doesn't make sense for any reason.
First, it doesn't make me more understand about accounting because it copied from my task book and Mr. Singgih doesn't teach us how to solved it, he just asked us to did and we've got a best score.
Second, I really didn't understand about it because I slept when Mr. Singgih tought.
But, I'm happy enough to seen my own task.