A：And do you have any questions?

B：No. But the contract stipulates that I will teach 22 hours a week. Will you have that many classes for me right away?

that 为程度副词，修饰many. that many再修饰classes。that的这种用法接近于so , so many classes.

A：No, probably not. For the first two weeks you may teach 10 or 15 hours.

B：But my salary will be 1,100 dollars a month. Will you pay me that much for the first month? Because, I mean, I won’t be working so many hours.

that仍然是程度副词，修饰不定代词much. 

A：That’s right. So in a way, it is cheaper for you than for the members. You get more benefits than they do.

B：So, for now, you want me to keep a copy of the contract. But we won’t sign it yet. Is that right?

A：Yes. I’ve prepared the contract just so that you understand everything. So that you understand the terms.

so that为复合从属连词，引导目的状语从句。承前省略了主句。