You do realize how absolutely pointless this survey is, right? Taking exactly 13 credits is rare, and even difficult. Most universities have four credit courses, so one would have to take three courses and then one 1 credit PE course. If courses are 3 credits, then four of those and a one credit PE course. Book costs are very subjective, depending on the courses. As you must know, a required text can be anywhere from a $10 instructional manual to a $225 text. Trust me, textbook companies know precisely the spending amounts already. Your survey accomplishes nothing and only feeds the beast of pointless "academic research." Get real, and try doing something that you can at least pretend matters.
