CMU financial documents

CMU的isi-form上面关于财产证明有这样一句话：

 Financial support must equal or exceed tuition and expenses for the first academic year. We must also consider how you will meet the expenses for the entirety of your program. Therefore, you or your sponsor must include additional financial statements or a letter explaining how future expenses will be paid.

请问后面这一部分要怎么写？有人写过吗？有没有模板？

谢谢！

W大博客里面有的，看一下这个：
[准确答案]如何办理留学和签证的银行财力证明？AFFIDAVIT OF SUPPORT需要公证吗？学校表格要填写吗？