Nothing is going to be standard about a 35 year old transferee attending Amherst, where 98% of your fellow students will be at least 10 years younger than you.
If you are using on-campus room and board, I have to think that your other living expenses will be relatively small next academic year. What about health insurance? Do you and your wife have it already, and do you have coverage in mind for a newborn next year? If you will have your own insurance that’s acceptable to Amherst when you start in the fall, then you can take that $2,358 line item off of your estimated cost.