Just thought that I'd post an update.
I finally get to the fee table. I told them that I was disputing the book fee but not the registration fee. The lady was very snotty with me. She said, "you know that we pay 6 times the cost to send your DD there instead of here don't you?" I just about blew my top. There are some very important reasons why DD goes to the other school (one of which is that a school employee broke my DD's leg requiring two titanium rods to be inserted into her leg) but I didn't want to go into that in a room full of people.
She then sent me to the
bookstore people. I explained again. The man helping me was very kind but the other lady at the table was snotty. She made a very similar comment to me about the cost of sending DD to the other school. My only comment to her was that FAPE required that they do that. I calmly explained to her that if I'm paying $75 for books for DD, I want the books. She told me that she couldn't do that as no books would be issued to DD. She said "We're already giving you a $10 discount. The book fee is supposed to be $85!" She then went on to say that it's separated because of grant funding. That of course led me to question her. If they are claiming DD's need for books for grants, why isn't she getting the books?

Someone else higher up in the school then came over and tried to explain to the lady that what they are doing is probably illegal, or at least against the grant/funding rules.
They then advised me to call our administration department.
I did that on the way home. The assistant super. apologized for the mistake and thanked me for bringing it to their attention. She said that I was right and that we are only required to pay the registration fee. She said that she would call the school and speak to the lady directly.
My check for the $65 registration fee is already in the mail to the assistant super. at our administration center.