In my stips, under college costs and expenses, it says costs should be paid 1) by child's contribution, scholarships, loans; 2) gifts or donations 3) parents who will contribute towards the costs of education.

There is no wording that says we are required to pay a certain dollar figure or a certain percentage. I have a little saved towards college and will help where I can, but now my ex is saying I have to split any costs 50/50. My kids has the option of going to a $8K a year shcool up to $41K a year school. I can afford the $8K - if my kid chooses to go to the $41K a year school, do I have to pay for that?