Wow $90 workbook? The workbooks made by my course professors cost only $10-20 from the university photocopy shop - which is half as expensive as doing the photocopying yourself. When they're available it comes with homework, lecture notes, etc. It also isn't counted towards the grade...
When they're not available, because the lecturer did not author a workbook, we'd have to buy a $150-$250 textbook. I really hate it when the lecturer of Finance 1 and the lecturer of Finance 2 use different textbooks, even though one of the textbooks already have content of both of the courses. Luckily our library has a section full of textbooks with daily usage time limit of 2 hours. That means they're usually available when I go in to use one for homework - I don't even need to carry it with me...
When they're not available, because the lecturer did not author a workbook, we'd have to buy a $150-$250 textbook. I really hate it when the lecturer of Finance 1 and the lecturer of Finance 2 use different textbooks, even though one of the textbooks already have content of both of the courses. Luckily our library has a section full of textbooks with daily usage time limit of 2 hours. That means they're usually available when I go in to use one for homework - I don't even need to carry it with me...
Which university do you go to?