If you have a textbook for this subject you should not have to feel that you need a excel crappy study guide to give you all the answers. This subject is easy a pie and i dont see why you would need extra information really just need to make sure that you complete all the work set for you in class and past hsc papers done in order to be prepared for the exams.
The syllabus can be printed off the Board Of Studies website if you need to know what you are to study, and look at the last column on the right and this will show you what you need to know!
The Business Services exam expects you to also write 2 ext response question thoroughly in 1 hour, which equates to 1/2 hour each to write a quality response and also these responses can cover any of the 14 competencies in the course.
It takes common sense to pass this subject and if you havn't got the ability to place yourself in a workplace scenario your pretty much gonna screw up your exam really!