In the section below, traveler will have to select the "Per Diem Rate" in Column "B". Total per diem will auto fill. 84.In the section below, the traveler will have to select the "Daily Per Diem Rate" in Column "B". It typically details the principal balance, interest due as of that date, per diem, any late fees, etc. After completing the pages that are needed for your reimbursement, attach them to the Travel and Expense Statement with supporting documentation. Use the per diem calculator tool to calculate per diem travel meals and incidental expenses. (See per diem calculator page for instructions. Total per diem will auto fill. 52. 53. By including a per diem amount in the letter, the parties will not have to execute another payoff letter if the termination date. Employees must sign (manual or electronic) their travel expense statement, attesting the information presented on the form is accurate and complete.