Education

The answer about Activity and Lab Fees not included in the 1099-T was helpful. However, I don't think the original question was answered.  It seems that "Books and materials required to be purchased from the school" plus "Books and materials not required to be purchased from the school is 100% of "Books and Materials" cost. If so then what is "Other Books and Course Related Materials?" Are we supposed to include amounts here that are already included in the other 2 categories. If so, then  what kind of expenses are they?  If the 1st 2 categories is less than 100% of books and materials, then do the amounts left over go into "Other Books and Course Related Materials?". We need more clarification on what this "Other Books and Course Related Materials" category is.