A summary statement, an itemized statement and an explanation of benefits are not versions of the same page. Here is what each one can prove, and which to request first.
Several different deadlines run at once in any disagreement, set by different people for different reasons, and the earliest one is usually the least advertised.
The four year degree is treated as the safe choice and the thing to do while undecided. It is a large commitment and it deserves to be chosen rather than defaulted into.
A big customer's contract is written to protect the big customer, which is normal. Most of it is negotiable, and knowing which parts to push on is the whole skill.
Tuition is the figure on the letter and rarely the figure that decides anything. The rest of it is entirely knowable in January if somebody sits down and lists it.