I suggest you and your classmates refer to Schedule A instructions. https://www.irs.gov/pub/irs-pdf/i1040sca.pdf

Where do you think you should enter the $8.,400?

If it were not reimbursed where do you think you should enter the $10,100?

Once you have answered those two problems, look for input in that same are for "reimbursement".

All of your questions are really related to tax issues, as all the medical deductions are in the same fairly small area of the program. You can find input by using "check return" and looking at the form involved. Click on the line you want to make an entry for and it will jump to the input (generally.)